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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (expense), net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MergerTransactionsCompletionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Merger transactions completion date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MergerTransactionsCompletionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Merger Transactions Completion Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MergerTransactionsCompletionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Merger transactions completion date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BBP418ForLGMD2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BBP-418 for LGMD2I/R9</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BBP418ForLGMD2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BBP 418 for LGMD2I/R9 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BBP418ForLGMD2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BBP 418 for LGMD2I/R9.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of Term Loans after deducting debt discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Term Loans After Deducting Debt Discount and Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of term loans after deducting debt discount and issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedStockOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Performance-Based stock options issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedStockOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Performance Based Stock Options Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedStockOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of performance-based stock options issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AcoramidisForAttrCmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acoramidis for ATTR-CM [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AcoramidisForAttrCmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Acoramidis for ATTR-CM.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AcoramidisForAttrCmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acoramidis For Attr Cm</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FrankMccormickMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Frank McCormick member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FrankMccormickMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Frank McCormick [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of restricted stock unit (RSU) shares to satisfy tax withholding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrCharlesJHomcyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dr. Charles J. Homcy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrCharlesJHomcyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dr Charles J Homcy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrCharlesJHomcyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dr. Charles J. Homcy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Group Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating costs and expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenues:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEqualMonthlyInstallments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of equal monthly installments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEqualMonthlyInstallments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Equal Monthly Installments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEqualMonthlyInstallments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of equal monthly installments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LianBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LianBio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LianBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lian Bio [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LianBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LianBio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential Fixed Monetary Amount Settlement in Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Fixed Monetary Amount Settlement In Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone fixed monetary amount settlement in stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price per Option, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransactionCostsIncurredInMergerTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs incurred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransactionCostsIncurredInMergerTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Costs Incurred In Merger Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransactionCostsIncurredInMergerTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction costs incurred in merger transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of option to purchase additional notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Option To Purchase Additional Notes Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Instrument Option to Purchase Additional Notes Exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Equivalents and Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, and Marketable Securities [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">A&amp;R 2019 Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Nineteen Stock Option And Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand nineteen stock option and incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BridgeBio Equity Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bridge Bio Services Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BridgeBio Services, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other noncash adjustments, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Noncash Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNoncashIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Noncash Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in nonconsolidated entities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegularEquityProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular Equity Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegularEquityProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regular Equity Program Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegularEquityProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regular equity program member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance-based milestone awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Milestone Awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance-based milestone awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateMinimumCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Minimum Commitment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateMinimumCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate minimum commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateMinimumCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate minimum commitment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayableFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated Fair Values</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost Of License And Services Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost of License and Services Revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of License and Services Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPurchasePriceEqualToHardCap_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of purchase price equal to hard cap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPurchasePriceEqualToHardCap_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Purchase Price Equal To Hard Cap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPurchasePriceEqualToHardCap_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of purchase price equal to hard cap.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumRequiredFuturePaymentUponAchievementOfCertainDevelopmentAndMilestoneEventsNetSalesMetrics_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum required future payment upon achievement of certain development and milestone events net sales metrics</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumRequiredFuturePaymentUponAchievementOfCertainDevelopmentAndMilestoneEventsNetSalesMetrics_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Required Future Payment Upon Achievement Of Certain Development And Milestone Events Net Sales Metrics</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumRequiredFuturePaymentUponAchievementOfCertainDevelopmentAndMilestoneEventsNetSalesMetrics_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum required future payment upon achievement of certain development and milestone events net sales metrics.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfInterestExpenseRecognizedAndEffectiveInterestRatesRelatedToNotesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Total Interest Expense Recognized and Effective Interest Related to Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfInterestExpenseRecognizedAndEffectiveInterestRatesRelatedToNotesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Interest Expense Recognized And Effective Interest Rates Related To Notes [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfInterestExpenseRecognizedAndEffectiveInterestRatesRelatedToNotesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of interest expense recognized and effective interest rates related to notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Business Combination, Consideration Transferred, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationConsiderationTransferred1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Consideration Transferred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Supplemental Cash Flow Information Related to Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Supplemental Cash Flow Information Related To Leases Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of supplemental cash flow information related to leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Amount Capitalized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense, capitalized to inventory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyThreeAtTheMarketAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023 ATM Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyThreeAtTheMarketAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Three At The Market Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyThreeAtTheMarketAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">2023 at the market agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForPrivateEquityFinancingWithExternalInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment for equity private financing with external investors.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForPrivateEquityFinancingWithExternalInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment for Private Equity Financing with External Investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForPrivateEquityFinancingWithExternalInvestors_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment for private equity financing with external investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, Remainder of 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Accruedexitfeesforresearchanddevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued Exit Fees For Research And Development.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Accruedexitfeesforresearchanddevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Accruedexitfeesforresearchanddevelopment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AccruedExitFeesForResearchAndDevelopment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PrincipleAmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Principle amount paid to lenders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PrincipleAmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Principle Amount Paid To Lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PrincipleAmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principle amount paid to lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherResearchProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Research Programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherResearchProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Research Programs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherResearchProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other research programs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer D</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer D.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementToPayRemainingPayableAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Agreement to Pay Remaining Payable Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementToPayRemainingPayableAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement to pay remaining payable amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementToPayRemainingPayableAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement to pay remaining payable amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lender Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lender Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance-based milestone awards compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Milestone Awards Compensation Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based milestone awards compensation expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostSharingCreditOfTheLesserOfFixedPercentageOfCertainAgreedUponServiceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cost sharing credit of the lesser of a fixed percentage of certain agreed upon service costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostSharingCreditOfTheLesserOfFixedPercentageOfCertainAgreedUponServiceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost Sharing Credit Of The Lesser Of Fixed Percentage Of Certain Agreed Upon Service Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostSharingCreditOfTheLesserOfFixedPercentageOfCertainAgreedUponServiceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost sharing credit of the lesser of fixed percentage of certain agreed upon service costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock repurchased during period, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Repurchase of common stock,Shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Disclosures of Noncash Investing and Financing Information:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Stock Purchase Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest expense</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseNonoperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Nonoperating, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedMarketBasedRestrictedStockUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested Market-Based RSUs</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedMarketBasedRestrictedStockUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unvested market-based restricted stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AnnualNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Annual Net Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AnnualNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Annual net sales.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AnnualNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public Offerings</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsAndMarketableSecuritiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash equivalents and marketable securities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsAndMarketableSecuritiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents And Marketable Securities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alexion agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alexion Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alexion Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Alexion Pharmaceuticals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal value of term loan under the Amended Financing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsCommittedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investors committed amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsCommittedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments Committed Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsCommittedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity method investments committed amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeaseAgreementExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease agreement expiration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeaseAgreementExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Agreement Expiration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeaseAgreementExpiration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease agreement expiration.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPotentialPaymentExtendedAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument potential payment extended amortization date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPotentialPaymentExtendedAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Potential Payment Extended Amortization Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPotentialPaymentExtendedAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument potential payment extended amortization date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inventories</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncorporatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TheRas, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncorporatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">The RAS Incorporated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncorporatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The RAS Incorporated.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortized Cost Basis Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortized Cost Basis Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential Fixed Monetary Amount Settlement in Cash or stock at our sole discretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Fixed Monetary Amount Settlement In Cash Or Stock At Sole Discretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone fixed monetary amount settlement in cash or stock at sole discretion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssetsRecognizedInRelationToMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets Recognized in Relation to Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssetsRecognizedInRelationToMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets recognized in relation to milestone payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssetsRecognizedInRelationToMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets initially recognized in relation to milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontNonrefundablePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront nonrefundable payment received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontNonrefundablePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Nonrefundable Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontNonrefundablePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront nonrefundable payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceRepurchaseOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance (repurchase) of noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceRepurchaseOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Repurchase Of Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceRepurchaseOfNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance (repurchase) of noncontrolling interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options Outstanding, Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfNonvestedRestrictedStockUnitsAndRestrictedStockAwardsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Restricted Stock Units and Restricted Stock Awards Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfNonvestedRestrictedStockUnitsAndRestrictedStockAwardsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Nonvested Restricted Stock Units and Restricted Stock Awards Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfNonvestedRestrictedStockUnitsAndRestrictedStockAwardsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of nonvested restricted stock units and restricted stock awards activity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Operating Capital [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeconsolidationGainOrLossAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on deconsolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeconsolidationGainOrLossAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation, Gain (Loss), Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeconsolidationGainOrLossAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Gain on deconsolidation of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from term loan under Amended Financing Agreement (as described in Note 9)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gains recognized on investments in equity securities sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Realized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Equity Securities, FV-NI, Realized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Realized losses recognized on investment in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Realized gain (losses) recognized on investment in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateOfferingPriceOfCommonStockThatMayIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate offering price of common stock that may issued and sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateOfferingPriceOfCommonStockThatMayIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Offering Price Of Common Stock That May Issued And Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AggregateOfferingPriceOfCommonStockThatMayIssuedAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate offering price of common stock that may issued and sold.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Common Stock, Shares, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KKCLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">KKC License Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KKCLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">KKC License Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KKCLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">KKC license agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Prepaid Expense and Other Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialSalesMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential sales milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialSalesMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Sales Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialSalesMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential sales milestone payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Employee Stock Purchase Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees purchased under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WarrantToPurchaseSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant to Purchase shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WarrantToPurchaseSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant to purchase shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WarrantToPurchaseSharesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss before income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ParentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, convertible, threshold percentage of stock price trigger</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Marketable Securities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exit cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExitCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exit cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DevelopmentAndRegulatoryMilestonePaymentsYetToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Development and regulatory milestone payments yet to be received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DevelopmentAndRegulatoryMilestonePaymentsYetToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Development and regulatory milestone payments yet to be received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseFees_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Regulatory milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer Concentration Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CustomerConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eidos</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eidos Therapeutics Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eidos Therapeutics, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Eidos Therapeutics, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrNeilKumarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dr. Neil Kumar.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrNeilKumarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dr Neil Kumar [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrNeilKumarMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dr. Neil Kumar [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Deconsolidation Of Entities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain loss on deconsolidation of entities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on deconsolidation of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByLiabilityClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liability Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer A.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer A</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationAfterInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationAfterInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation After Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationAfterInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contractual obligation after interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payments Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payments received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Raw materials</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryRawMaterials_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Raw Materials, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsContributedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments, Contributed Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsContributedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity method investments, contributed amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsContributedAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments contributed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance costs and discounts associated with issuance of term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Issuance costs and discounts associated with term loan under Amended Financing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock, Common, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury stock, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonShares_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DevelopmentAndManufacturingServicesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Resilience DMSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DevelopmentAndManufacturingServicesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Development And Manufacturing Services Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DevelopmentAndManufacturingServicesAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Development and Manufacturing Services Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFourFollowOnOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 Follow-on Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFourFollowOnOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four Follow On Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFourFollowOnOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty four follow on offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share attributable to common stockholders of BridgeBio, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashOrPartNoncashInvestingTransferFromToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Or Part Noncash Investing Transfer From To Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashOrPartNoncashInvestingTransferFromToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncash or part noncash investing transfer (from) to noncontrolling interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashOrPartNoncashInvestingTransferFromToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers to noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasePrincipalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing cash flows for finance lease - cash paid for principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeasePrincipalPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Principal Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentInterestOnlyExtensionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument interest only extension date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentInterestOnlyExtensionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Interest Only Extension Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentInterestOnlyExtensionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument interest only extension date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Collaboration Agreement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License and collaboration agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and Collaboration Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConcentrationOfCreditRiskAndOtherRisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Concentration of credit risk and other risks and uncertainties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConcentrationOfCreditRiskAndOtherRisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Of Credit Risk And Other Risks And Uncertainties Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConcentrationOfCreditRiskAndOtherRisksAndUncertaintiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of Credit Risk and Other Risks and Uncertainties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Variable Interest Entity, Primary Beneficiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Entity, Primary Beneficiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity, Primary Beneficiary [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEmployeesForReplacementAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of employees for replacement awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEmployeesForReplacementAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Employees For Replacement Awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfEmployeesForReplacementAwards_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of employees for replacement awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, amount available to be drawn</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unused Borrowing Capacity, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization expenses, 2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdvertisingCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advertising Cost [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdvertisingCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advertising Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of cash released from escrow accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Cash Released from Escrow Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash released from escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Discount Rate, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument drawn amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Term loan, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BristolMyersSquibbCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bristol-Myers Squibb Company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BristolMyersSquibbCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bristol Myers Squibb Company [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BristolMyersSquibbCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BMS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BristolMyersSquibbCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Bristol-Myers Squibb Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueAfterFifthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueAfterFifthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from exercise of remaining portion of option to purchase additional notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Option To Purchase Additional Notes Remaining Portion Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, option to purchase additional notes remaining portion exercised.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoticePeriodForTerminationOfAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notice period for termination of agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoticePeriodForTerminationOfAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notice Period for Termination of Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoticePeriodForTerminationOfAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Notice period for termination of agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Retained Earnings (Accumulated Deficit), Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Retained Earnings (Accumulated Deficit), Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Retained Earnings (Accumulated Deficit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_USTreasuryBillSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury Bills</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_USTreasuryBillSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">US Treasury Bill Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Options Outstanding, Outstanding, Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Options Outstanding, Outstanding, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLimitedLiabiltyCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gondola Bio, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLimitedLiabiltyCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gondola Bio Limited Liabilty Company [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLimitedLiabiltyCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gondola bio limited liabilty company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Capital Shares Reserved for Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueLiabilitiesTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value liabilities, transfers between Level 1, Level 2 or Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueLiabilitiesTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Liabilities Transfers Between Level One Level Two Or Level Three Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueLiabilitiesTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value liabilities transfers between level one level two or level three amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavireBmsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Navire BMS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavireBmsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Navire BMS [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavireBmsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Navire BMS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of options issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Options Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfOptionsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of options issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityTransferToFromNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary Equity, transfers from (to) noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityTransferToFromNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Transfer To From Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityTransferToFromNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity transfer to (from) noncontrolling interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpenseSettledWithEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance based milestone awards compensation expense settled with equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpenseSettledWithEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Milestone Awards Compensation Expense Settled With Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsCompensationExpenseSettledWithEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based milestone awards compensation expense settled with equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment arrangement, consecutive trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Consecutive Trading Days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementConsecutiveTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based payment arrangement, consecutive trading days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProductRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Product Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProductRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net Product Revenue [Member].</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProductRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net Product Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherRSAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other RSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherRSAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other R S As [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherRSAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other RSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LesseeOperatingAndFinancingLeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LesseeOperatingAndFinancingLeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating And Financing Leases Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LesseeOperatingAndFinancingLeasesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lessee operating and financing leases disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityIssuanceRepurchaseOfNoncontrollingInterestValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary Equity, issuance (repurchase) of noncontrolling interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityIssuanceRepurchaseOfNoncontrollingInterestValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Issuance Repurchase Of Noncontrolling Interest Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityIssuanceRepurchaseOfNoncontrollingInterestValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity issuance (repurchase) of noncontrolling interest, value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RoyaltyExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RoyaltyExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalties on net product revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated other comprehensive income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accumulated Other Comprehensive Income (Loss), Net of Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationInterestPortion_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less amounts representing interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationInterestPortion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation Interest Portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ContractualObligationInterestPortion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Contractual obligation interest portion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected life of notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Property, Plant and Equipment, Net, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, 2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recurring</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SellerPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Seller Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SellerPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seller Parties [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SellerPartiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Seller parties.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Assets and Liabilities Measured at Fair Value on Recurring Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer B.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer B</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Employee Stock Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized gain (loss) on available-for-sale securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized losses on available-for-sale securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndMarketableSecuritiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents And Marketable Securities [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndMarketableSecuritiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash, Cash Equivalents And Marketable Securities [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndMarketableSecuritiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, Cash Equivalents and Marketable Securities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Taxes Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxesPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Taxes Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeconsolidationOfSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deconsolidation Of Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeconsolidationOfSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deconsolidation of subsidiary.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Grant-date fair value of RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based compensation arrangement by share-based payment award, equity instruments other than options, grant date fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investors financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marketable securities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net gain recognized transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Gain recognized, net of transactions costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory milestone payments received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Milestone Payments Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone payments received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument mandatory prepayments percentage of net cash proceeds from prepayment event transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Mandatory Prepayments Percentage of Net Cash Proceeds from Prepayment Event Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument mandatory prepayments percentage of net cash proceeds from prepayment event transaction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deposit percentage of proceeds net of certain permitted costs received from asset sale transactions into escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, General and Administrative Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expenses [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosAwardExchangePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eidos Award Exchange Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosAwardExchangePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eidos Award Exchange Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EidosAwardExchangePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eidos Award Exchange Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Components</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Components [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfGoodsSoldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost Of Goods Sold [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfGoodsSoldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost Of Goods Sold [Member].</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfGoodsSoldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cost of Goods Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Kyowa Kirin Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kyowa Kirin Co., Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Kyowa Kirin Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee-related Liabilities, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation and benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeRelatedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee-related Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested Shares of Restricted Stock Outstanding, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedCompensationAndBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Compensation and Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedCompensationAndBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Compensation and Benefits [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedCompensationAndBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued compensation and benefits.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Intangible Asset, Finite-Lived [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Summary of Recognized Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets Amortization Expense [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedules of Concentration of Risk, by Risk Factor [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SchedulesOfConcentrationOfRiskByRiskFactorTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Concentration, Percentage of Gross Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Collaboration Agreement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License and collaboration agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total other income (expense), net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Common Stock Equivalents were Excluded from Computation of Diluted Net Loss per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Voting shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockUnitsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of RSUs issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockUnitsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Restricted Stock Units Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockUnitsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of restricted stock units issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InfigratinibMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Infigratinib [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InfigratinibMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Infigratinib.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InfigratinibMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Infigratinib for Achondroplasia and Hypochondroplasia</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of RSAs issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Restricted Stock Awards Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of restricted stock awards issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested shares of restricted stock outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Unvested Shares of Restricted Stock Outstanding, Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Unvested Shares of Restricted Stock Outstanding, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodAndOtherEquityInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity method and other equity investments.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Income (Loss) Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConvertibleSeniorNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConvertibleSeniorNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Convertible senior notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ConvertibleSeniorNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Senior Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialRegulatoryMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential regulatory milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialRegulatoryMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Regulatory Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialRegulatoryMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential regulatory milestone payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities, net of current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Current Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Corporate Debt Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CorporateDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Corporate Debt Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographic Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeographicConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Additional Paid in Capital, Common Stock, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Additional Paid in Capital, Common Stock, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital, Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Embedded derivative (included in "Deferred royalty obligations, net")</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair value of embedded derivatives liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair value of embedded derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment from escrow accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment from Escrow Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment from escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EuropeanCommissionRegulatoryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EU Commission Regulatory</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EuropeanCommissionRegulatoryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">European Commission Regulatory [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EuropeanCommissionRegulatoryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">European Commission Regulatory.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Options Outstanding, Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options Outstanding, Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StockIssuedWithPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock Issued With Premium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StockIssuedWithPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued With Premium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StockIssuedWithPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate purchase price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Research and Development Services Performance Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInSecondYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInSecondYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPaymentAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument payment amortization date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPaymentAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Payment Amortization Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPaymentAmortizationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt Instrument Payment Amortization Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest and amortization expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (expense), net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income Loss Excluding Redeemable Noncontrolling Interests Net Income Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net income (loss) excluding redeemable noncontrolling interests net income (loss).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock, Common [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockCommonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Treasury Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation of Cash, Cash Equivalents and Restricted Cash:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementPerformancePeriodFromDateOfGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based payment arrangement, performance period from date of grant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementPerformancePeriodFromDateOfGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-based Payment Arrangement, Performance Period From Date Of Grant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareBasedPaymentArrangementPerformancePeriodFromDateOfGrant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-based payment arrangement, performance period from date of grant.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Revenue, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preferred Stock, Shares Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating cash flows for operating leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from stock option exercises, net of repurchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Stock Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StanfordLicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stanford license agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StanfordLicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stanford License Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_StanfordLicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stanford License Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfSalesAgentsCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of sales agents commission</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfSalesAgentsCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Sales Agents Commissions On Gross Proceeds Of Sales Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfSalesAgentsCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of sales agents commissions on gross proceeds of sales of common stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted cash - Included in "Prepaid expenses and other current assets"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandSixteenEquityIncentivePlanAndTwoThousandEighteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eidos 2016 and 2018 Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandSixteenEquityIncentivePlanAndTwoThousandEighteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Sixteen Equity Incentive Plan And Two Thousand Eighteen Stock Option And Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandSixteenEquityIncentivePlanAndTwoThousandEighteenStockOptionAndIncentivePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand sixteen equity incentive plan and two thousand eighteen stock option and incentive plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidIssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unpaid Issuance Costs Associated With Royalty Obligation Under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidIssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unpaid issuance costs associated with royalty obligation under royalty purchase agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidIssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid issuance costs associated with royalty obligation under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposalStatementOfIncomeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCashPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash per share in transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCashPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Cash Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCashPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business acquisition cash per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employees purchased under ESPP, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RandalWScottMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Randal W. Scott.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RandalWScottMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Randal W. Scott [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentsMaturityYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentsMaturityYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instruments Maturity Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentsMaturityYear_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instruments maturity year.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionEquityInterestsIssuedOrIssuableFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionEquityInterestsIssuedOrIssuableFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Equity Interests Issued Or Issuable Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionEquityInterestsIssuedOrIssuableFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business acquisition equity interests issued or issuable fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesCommissionsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales agent fees and commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesCommissionsAndFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Commissions and Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred revenue, net of current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred revenue, noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Revenue, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenueNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Revenue Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense and Other Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price per Option, Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alexion license agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alexion License Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alexion License Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerCommercialSupplyAgreementAndBayerAPISupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bayer Commercial Supply Agreement and Bayer API Supply Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerCommercialSupplyAgreementAndBayerAPISupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bayer Commercial Supply Agreement and Bayer API Supply Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerCommercialSupplyAgreementAndBayerAPISupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bayer Commercial Supply Agreement and Bayer API Supply Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash, non-current - included in "Other assets"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted cash - Included in "Other assets"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Severance and employee-related costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SeveranceCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Severance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedRegulatoryBasedMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued regulatory-based milestone payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedRegulatoryBasedMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Regulatory Based Milestone Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedRegulatoryBasedMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued regulatory-based milestone payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive loss attributable to common stockholders of BridgeBio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary Equity, deconsolidation of a subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity deconsolidation of entities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Deconsolidation Of Entities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration by Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration by Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and Contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfNonfinancialAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of Nonfinancial Assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfNonfinancialAssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Nonfinancial Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average Estimated Useful Lives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryAndSalesMilestonePaymentsEligibleToReceive_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory and Sales Milestone Payments Eligible to Receive.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryAndSalesMilestonePaymentsEligibleToReceive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory and sales milestone payments eligible to receive</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Benchmark [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SalesRevenueNetMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Benchmark</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAccruedInterestConvertibleIntoPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued interest convertible into principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAccruedInterestConvertibleIntoPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Accrued Interest Convertible into Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAccruedInterestConvertibleIntoPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument accrued interest convertible into principal.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_HerculesCapitalIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hercules Capital, Inc</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_HerculesCapitalIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hercules Capital, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AspaTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aspa</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AspaTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aspa Therapeutics Inc.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfNonfinancialAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of Nonfinancial Assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfNonfinancialAssetsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Nonfinancial Assets [Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based stock options.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EmployeeAndNonEmployeeServiceShareBasedCompensationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee and non-employee service share based compensation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShortTermLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Short-term liability fair value disclosure.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsAndShareRepurchaseProgramAndSecuritiesPurchaseAgreementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Public Offerings, Share Repurchase Program and Securities Purchase Agreement [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsAndShareRepurchaseProgramAndSecuritiesPurchaseAgreementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public offerings and share repurchase program and securities purchase agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DirectOfferingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Direct offering expense</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DirectOfferingExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Direct offering expense.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfDeferredRoyaltyObligationsNetTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Deferred Royalty Obligations, Net [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfDeferredRoyaltyObligationsNetTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Deferred Royalty Obligations, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Project [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027 Notes</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two point five zero percentage convertible senior notes due two thousand and twenty seven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2027 Convertible Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMinimumUnrestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum unrestricted cash balance</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMinimumUnrestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument minimum unrestricted cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance costs associated with royalty obligation under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Costs Associated With Royalty Obligation Under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance costs associated with royalty obligation under royalty purchase agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Issuance costs associated with royalty obligation under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Equity Method Investments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument prepayment premium percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Prepayment Premium Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPremiumPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument prepayment premium percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Straight line operating lease costs</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional quarterly principal payments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease cost</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EqualMonthlyInstallmentsAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equal monthly installments amount.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WarrantsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants exercised</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Grant Date Fair Value, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost, period for recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WhollyOwnedSubsidiaryDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wholly Owned Subsidiary Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WhollyOwnedSubsidiaryDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wholly owned subsidiary disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExclusiveLicenseAgreementsWithBayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exclusive license agreements with Bayer Consumer Care AG and Kyowa Kirin Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExclusiveLicenseAgreementsWithBayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exclusive license agreements with Bayer Consumer Care AG and Kyowa Kirin Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExclusiveLicenseAgreementsWithBayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exclusive license agreements with Bayer Consumer Care AG and Kyowa Kirin Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Federal Income Tax Expense (Benefit), Continuing Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Federal Income Tax Expense (Benefit), Continuing Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">U.S. Federal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceivableSubjectToAchievementOfRegulatorMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone payment receivable subject to achievement of regulator milestones.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceivableSubjectToAchievementOfRegulatorMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Milestone Payment Receivable Subject To Achievement Of Regulator Milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceivableSubjectToAchievementOfRegulatorMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory milestone payment receivable subject to achievement of regulator milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementAndPlanOfMergerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Merger Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementAndPlanOfMergerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Agreement And Plan Of Merger [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementAndPlanOfMergerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement and Plan of Merger.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccretionExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accretion of debt</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Stock-based compensation cost associated with performance-based milestone awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-based Payment Arrangement, Expensed and Capitalized, Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation cost associated with performance-based milestone awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, convertible, threshold consecutive trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Threshold Consecutive Trading Days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred royalty obligations, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected term (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostRelatedToManufacturingSuiteAndAdditionalEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost related to manufacturing suite and additional equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostRelatedToManufacturingSuiteAndAdditionalEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost Related to Manufacturing Suite and Additional Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostRelatedToManufacturingSuiteAndAdditionalEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost related to manufacturing suite and additional equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of investments in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Equity Securities, FV-NI</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeOtherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee, Other [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unvested Shares of Restricted Stock Outstanding, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Restructuring liabilities, balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Restructuring liabilities, balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringReserveCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Reserve, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Accounting Pronouncements Not Yet Adopted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOCI Attributable to Parent [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss from equity method investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net loss from equity method investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income (Loss) from Equity Method Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss from equity method investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Difference Between Carrying Amount and Underlying Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Difference of between fair value of equity investment and underlying equity in net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockMaximumAmountOfStockRemainingEligibleToBeSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of Stock, maximum amount of stock remaining eligible to be sold.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockMaximumAmountOfStockRemainingEligibleToBeSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Maximum Amount Of Stock Remaining Eligible To Be Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockMaximumAmountOfStockRemainingEligibleToBeSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum amount of stock remaining eligible to be sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CANADA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Canada</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OnePointSevenFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">One Point Seven Five Percentage Convertible Senior Notes Due Two Thousand And Thirty One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OnePointSevenFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">One point seven five percentage convertible senior notes due two thousand and thirty one.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentYetToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payment yet to be received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentYetToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payment Yet To Be Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentYetToBeReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment yet to be received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unvested Shares of Restricted Stock Outstanding, Cancelled</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Restructuring</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Principal value</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument face amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleThresholdConsecutiveTradingDayPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of consecutive trading day period (Measurement period) for conversion of notes</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleThresholdConsecutiveTradingDayPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument convertible threshold consecutive trading day period.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RecognizedIntangibleAssetRecordedToOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Recognized intangible asset recorded to Other current liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RecognizedIntangibleAssetRecordedToOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recognized intangible asset recorded to "Other current liabilities"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentOptionToPurchaseAdditionalNotes_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument option to purchase additional notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForUnderwritingFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment For Underwriting Fees and Commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForUnderwritingFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment for underwriting fees and commissions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForUnderwritingFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting fees and commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction-in-Progress</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction in Progress [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of common shares authorized to issue for issuance of awards</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherConsolidatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Consolidated Entities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherConsolidatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Subsidiaries Equity Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherConsolidatedEntitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other Consolidated Entities.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares, shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LelandStanfordJuniorUniversityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leland Stanford Junior University.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LelandStanfordJuniorUniversityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leland Stanford Junior University</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfNetVestedSharesOfCommonStockToBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Net Vested Shares Of Common Stock To Be Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfNetVestedSharesOfCommonStockToBeIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of net vested shares of common stock to be issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount paid to lenders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount paid to Lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AmountPaidToLenders_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount paid to lenders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleThresholdBusinessDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of business days in consideration of conversion of notes</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleThresholdBusinessDays_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument convertible threshold business days.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PrepaymentFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepayment fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PrepaymentFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepayment fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unrealized losses recognized on investments in equity securities held as of the end of the period</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized gains or losses associated with our investment in equity securities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Royalty Obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Issuance of common stock under public offerings, net</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentsTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone payments term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Services Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License And Services Revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndServicesRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">License and Services Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenStockOptionAndIncentivePlanAndInducementEquityPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">A&amp;R 2019 Plan and 2019 Inducement Plan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenStockOptionAndIncentivePlanAndInducementEquityPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand nineteen stock option and incentive plan and inducement equity plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Line Items]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current liabilities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanSecurityAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan Security Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanSecurityAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loan Security Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LoanSecurityAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan security agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationUnderFundingAgreementNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligation Under Funding Agreement Net of Embedded Derivative Liability, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationUnderFundingAgreementNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligation under funding agreement net of embedded derivative liability, fair value disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationUnderFundingAgreementNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value of deferred royalty obligation under funding agreement, net embedded derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendIncomeEquitySecuritiesOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Income, Equity Securities, Operating</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExitFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Exit fees.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FoundationMedicineDiagnosticsAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Foundation medicine diagnostics agreement.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, 2030</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance-based milestone awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandAndThirtyOneTwoThousandAndTwentyNineAndTwoThousandAndTwentySevenNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">2031, 2029 and 2027 Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandAndThirtyOneTwoThousandAndTwentyNineAndTwoThousandAndTwentySevenNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2031, 2029 and 2027 Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total segment research and development</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleIncreaseInConversionRateNumberOfCommonStockIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, increase in conversion rate, number of shares issuable</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentConvertibleIncreaseInConversionRateNumberOfCommonStockIssuable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, convertible, increase in conversion rate, number of common stock issuable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options Outstanding, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Purchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty Purchase Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncrementalTermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incremental Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncrementalTermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incremental Term Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncrementalTermLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Incremental term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Gross, Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Gross, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction-in-progress asset</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumPotentialPerformanceBasedMilestoneAwardsToBeSettledInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Potential Performance Based Milestone Awards To Be Settled In Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumPotentialPerformanceBasedMilestoneAwardsToBeSettledInShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum potential performance based milestone awards to be settled in shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assumptions Used to Determine Fair Value of Stock Purchase Rights</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAmortizationPaymentDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization payment date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAmortizationPaymentDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Amortization Payment Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentAmortizationPaymentDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument amortization payment date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssumedConversionOfTwoThousandTwentyNineNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumed Conversion of 2029 Notes</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssumedConversionOfTwoThousandTwentyNineNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assumed conversion of two thousand twenty nine notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyOneCappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 Capped Call Transactions</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyOneCappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty one capped call transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringReserveByTypeOfCostTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Activity Related to Restructuring Liabilities Associated to Restructuring Plans</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementAdditionalExtensionPeriodOption_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Agreement additional extension period</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AgreementAdditionalExtensionPeriodOption_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement additional extension period option.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two point two five percentage convertible senior notes due two thousand and thirty one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2031 Notes</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SupranationalDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supranational Debt Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SupranationalDebtSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Supranational debt securities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instruments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedRestrictedStockAwardMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unvested Restricted Stock Award [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedRestrictedStockAwardMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unvested restricted stock award.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentRepaidPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentRepaidPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Repaid, Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Restricted Stock Award Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AllocationOfTransactionPriceToLicenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allocation of transaction price to licenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AllocationOfTransactionPriceToLicenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allocation Of Transaction Price To Licenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AllocationOfTransactionPriceToLicenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allocation of transaction price to licenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty obligation debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Obligation Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty obligation debt issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecuritiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Marketable Securities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecuritiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer, Excluding Assessed Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total revenues, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Comprehensive Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareRepurchaseTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareRepurchaseTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ShareRepurchaseTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share repurchase transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ReclassificationOfFinalPaymentObligationRelatedToManufacturingAgreementRecognizedInPriorPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reclassification Of Final Payment Obligation Related To Manufacturing Agreement Recognized in Prior Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ReclassificationOfFinalPaymentObligationRelatedToManufacturingAgreementRecognizedInPriorPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reclassification of final payment obligation related to manufacturing agreement recognized in prior period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ReclassificationOfFinalPaymentObligationRelatedToManufacturingAgreementRecognizedInPriorPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reclassification of final payment obligation related to a manufacturing agreement that was recognized in the prior period (see Note 13)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bayer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bayer .</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bayer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableRelatedToManufacturingSuite_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Remaining payable related to dedicated manufacturing suite</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableRelatedToManufacturingSuite_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payable related to manufacturing suite.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableRelatedToManufacturingSuite_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable Related To Manufacturing Suite</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenInducementEquityPlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Nineteen Inducement Equity Plans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenInducementEquityPlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand nineteen inducement equity plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenInducementEquityPlansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">A&amp;R 2019 Inducement Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rest of World [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rest of World [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RestOfWorldMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rest of World</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_OwnershipAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Ownership [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Entities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidated Entities [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">TheRas, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">The Ras Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TheRasIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">TheRas, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PriorityReviewVoucherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Priority Review Voucher.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PriorityReviewVoucherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Priority Review Voucher [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PriorityReviewVoucherMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Priority Review Voucher</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Selling, General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selling, general and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Selling, General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommonStockHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommonStockHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommonStockHeld_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Stock Held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock repurchased, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Repurchase of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InLicensingAndOtherResearchAndDevelopmentAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">In-Licensing and Other Research and Development Agreements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InLicensingAndOtherResearchAndDevelopmentAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">In-Licensing And Other Research And Development Agreements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InLicensingAndOtherResearchAndDevelopmentAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">In-licensing and other research and development agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredAndUnpaidIssuanceCostsRecordedToOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred and unpaid issuance costs recorded to Other Current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredAndUnpaidIssuanceCostsRecordedToOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred and unpaid issuance costs recorded to Other Current liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredAndUnpaidIssuanceCostsRecordedToOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred and unpaid issuance costs recorded to "Other current liabilities"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Period Increase (Decrease), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase (decrease) in common shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAggrementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transition service aggrement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAggrementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transition Service Aggrement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAggrementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transition Service Aggrement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Capitalization of finite-lived intangible asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finite-lived intangible asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Finite-Lived Intangible Assets, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Finite-Lived Intangible Assets, Net, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SpecialCashDividendDeclaredPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Special cash dividend declared per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SpecialCashDividendDeclaredPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Special cash dividend declared per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SpecialCashDividendDeclaredPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Special cash dividend declared per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseServicesAndRoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of License, Services and Royalty Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseServicesAndRoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost of license, services and royalty revenue.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostOfLicenseServicesAndRoyaltyRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of License, Services and Royalty Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payment received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyInterestPaymentsOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of royalty interest payments on net sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyInterestPaymentsOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Royalty Interest Payments on Net Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyInterestPaymentsOnNetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of royalty interest payments on net sales.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, frequency of interest payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Frequency of Periodic Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other accrued liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities, Redeemable Convertible Noncontrolling Interests and Stockholders' Deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInFourthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Year Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInFourthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Effective Income Tax Rate Reconciliation, Percent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effective Income Tax Rate Reconciliation, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Tax Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CarryingValueOfDeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Carrying Value of Deferred Royalty Obligations, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CarryingValueOfDeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Carrying value of deferred royalty obligations, net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CarryingValueOfDeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Carrying value of deferred royalty obligations, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashAndCashEquivalentsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashAndCashEquivalentsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash And Cash Equivalents Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashAndCashEquivalentsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash and cash equivalents fair value disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EntitiesAffiliatedWithPerceptiveLifeSciencesMasterFundLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entities Affiliated With Perceptive Life Sciences Master Fund Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EntitiesAffiliatedWithPerceptiveLifeSciencesMasterFundLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entities Affiliated With Perceptive Life Sciences Master Fund Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EntitiesAffiliatedWithPerceptiveLifeSciencesMasterFundLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Entities affiliated with Perceptive Life Sciences Master Fund Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, convertible, threshold trading days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleThresholdTradingDays_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Threshold Trading Days</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive securities excluded from computation of diluted net loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and Collaboration Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License And Collaboration Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LicenseAndCollaborationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License and collaboration agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BaseRatePlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base Rate plus Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BaseRatePlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Base Rate plus Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BaseRatePlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Base rate plus interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfUnderwritersCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of underwriters commissions on gross proceeds of sales of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfUnderwritersCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Underwriters Commissions on Gross Proceeds of Sales of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfUnderwritersCommissionsOnGrossProceedsOfSalesOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Underwriters Commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenAndTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2027 and 2029 Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenAndTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Point Five Zero Percentage Convertible Senior Notes Due Two Thousand And Twenty Seven And Two Thousand And Twenty Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenAndTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two point five zero percentage convertible senior notes due two thousand and twenty seven and two thousand and twenty nine.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_HannahAValantineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hannah A. Valantine.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_HannahAValantineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hannah A. Valantine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">APIC, Share-based Payment Arrangement, Increase for Cost Recognition, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">APIC, Share-Based Payment Arrangement, Increase for Cost Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity ownership percentage approximately</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, after Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, Thereafter</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Revenue, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer E</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer E [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer E.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_QEDTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">QED Therapeutics, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_QEDTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Q E D Therapeutics Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_QEDTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">QED Therapeutics, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OneTimeFeesReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">One time fees asset non-current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OneTimeFeesReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">One Time Fees Receivable Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OneTimeFeesReceivableNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">One time fees receivable noncurrent.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average remaining lease term (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Remaining Lease Term [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageRemainingLeaseTermAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted-average remaining lease term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for amounts included in the measurement of lease liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowOperatingActivitiesLesseeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Flow, Operating Activities, Lessee [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Parent, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Stockholders' Equity Attributable to Parent, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total BridgeBio stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Description of Variable Rate Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="exch_XNGS_lbl" xlink:role="http://www.xbrl.org/2003/role/label">NASDAQ/NGS (GLOBAL SELECT MARKET) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="exch_XNGS_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">The Nasdaq Global Select Market</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedRestrictedStockUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested RSUs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedRestrictedStockUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unvested Restricted Stock Unit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnvestedRestrictedStockUnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unvested restricted stock unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EMEAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EMEA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EMEAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EMEA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyPaymentEqualToAnnualCap_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Royalty Payment Equal To Annual Cap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyPaymentEqualToAnnualCap_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of royalty payment equal to annual cap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfRoyaltyPaymentEqualToAnnualCap_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of royalty payment equal to annual cap.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Other long-term liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Liabilities, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Liabilities, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial conversion price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionPrice1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Conversion Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">State and Local Income Tax Expense (Benefit), Continuing Operations, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">State and Local Income Tax Expense (Benefit), Continuing Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">State</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted Stock Units (RSUs)</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2029 Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Point Two Five Percentage Convertible Senior Notes Due Two Thousand And Twenty Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Point Two Five Percentage Convertible Senior Notes Due Two Thousand And Twenty Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2029 Convertible Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Deferred Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable lease costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableLeaseCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Lease, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMarketCapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Market capitalization amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMarketCapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Market Capitalization Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentMarketCapitalizationAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument market capitalization amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss from investment in equity securities, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total net gains (losses) included in "Other income (expense), net"</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain from investment in equity securities, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alexion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alexion [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AlexionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alexion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAggregateAmountNotExceedTheOriginalNetCashProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of aggregate amount not exceed the original net cash proceeds received from asset sale transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAggregateAmountNotExceedTheOriginalNetCashProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Aggregate Amount not Exceed the Original Net Cash Proceeds Received from Asset Sale Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAggregateAmountNotExceedTheOriginalNetCashProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of aggregate amount not to exceed the original net cash proceeds received from asset sale transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashPurchasedPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Purchased Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashPurchasedPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash purchased price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashPurchasedPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash Purchased Price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Based Compensation for Employees and Non Employees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization and Description of Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumPercentageOfEmployeePayrollDeductionForStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum percentage of employee payroll deduction for stock purchase.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumPercentageOfEmployeePayrollDeductionForStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Percentage Of Employee Payroll Deduction For Stock Purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumPercentageOfEmployeePayrollDeductionForStockPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum percentage of employee payroll deduction for stock purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reportable Segment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReportableSegmentAggregationBeforeOtherOperatingSegmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reportable Segment, Aggregation before Other Operating Segment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Performance-Based RSAs issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Performance Based Restricted Stock Awards Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfPerformanceBasedRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of performance-based restricted stock awards issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bayer License Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bayer license agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerLicenseAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bayer License Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unrealized Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">At-the-Market Offerings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AtTheMarketOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">At-the-market offerings.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Restructuring, Impairment and Related Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Costs [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EncaleretForAdh1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Encaleret for ADH1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EncaleretForAdh1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Encaleret for ADH1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EncaleretForAdh1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Encaleret for ADH1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TerminationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TerminationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Termination Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TerminationAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Termination agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNetTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Royalty Obligations, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNetTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligations Net [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNetTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligations, net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPurchaseAndSaleAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Interest Purchase And Sale Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPurchaseAndSaleAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty interest purchase and sale agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPurchaseAndSaleAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty Interest Purchase and Sale Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAgreementAndSubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transition Service Agreement And Sublease Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAgreementAndSubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transition service agreement and sublease agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TransitionServiceAgreementAndSubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transition Service Agreement And Sublease Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of cash, cash equivalents and restricted cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Cash Cash Equivalents And Restricted Cash Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfCashCashEquivalentsAndRestrictedCashTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Cash, Cash Equivalents and Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAutomaticAnnualIncreaseInNumberOfSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of automatic annual increase in number of shares reserved for future issuance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAutomaticAnnualIncreaseInNumberOfSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Automatic Annual Increase In Number Of Shares Reserved For Future Issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAutomaticAnnualIncreaseInNumberOfSharesReservedForFutureIssuance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of automatic annual increase in number of shares reserved for future issuance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsAndOtherEquityInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Method Investments And Other Equity Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsAndOtherEquityInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments And Other Equity Investments [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodInvestmentsAndOtherEquityInvestmentsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Method Investments And Other Equity Investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of concentration risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from royalty obligation under Royalty Purchase Agreement (as described in Note 10)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Royalty Obligation Under Royalty Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderRoyaltyPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from royalty obligation under royalty purchase agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Current Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCurrentLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfFutureMinimumLeasePaymentsForNoncancelableOperatingAndFinanceLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Future Minimum Lease Payments for Noncancelable Leases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfFutureMinimumLeasePaymentsForNoncancelableOperatingAndFinanceLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Future Minimum Lease Payments For Noncancelable Operating And Finance Leases Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfFutureMinimumLeasePaymentsForNoncancelableOperatingAndFinanceLeasesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of future minimum lease payments for noncancelable operating and finance leases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExcessOfPurchasePriceOverValueOfCommonStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Excess of purchase price over the value of common stock shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExcessOfPurchasePriceOverValueOfCommonStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Excess Of Purchase Price Over Value Of Common Stock Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ExcessOfPurchasePriceOverValueOfCommonStockShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excess of purchase price over the value of common stock shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCommonShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Right to receive of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCommonShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Common Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessAcquisitionCommonShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business acquisition common share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MinimumPurchaseCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Purchase Commitment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MinimumPurchaseCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum purchase commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MinimumPurchaseCommitment_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Minimum purchase commitment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value by Liability Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodAndCostMethodInvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method And Cost Method Investment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EquityMethodAndCostMethodInvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Method And Cost Method Investment Abstract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Expenses, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInThirdYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investors contribution fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, conversion, equivalent shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Number of Equity Instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestonePaymentReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Milestone payment receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestonePaymentReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Milestone Payment Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestonePaymentReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Milestone payment receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-Lived Tangible Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Lived Tangible Asset [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Obligations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, 2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average grand date fair value of options granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted-average fair value of stock-based awards granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring, Impairment and Related Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities, redeemable convertible noncontrolling interests and stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncreaseDecreaseInAccruedResearchAndDevelopmentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued research and development liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncreaseDecreaseInAccruedResearchAndDevelopmentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accrued Research And Development Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_IncreaseDecreaseInAccruedResearchAndDevelopmentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase (decrease) in accrued research and development liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumNumberOfSharesEligibleToPurchaseDuringOfferingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares eligible to purchase during offering period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumNumberOfSharesEligibleToPurchaseDuringOfferingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum number of shares eligible to purchase during offering period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MaximumNumberOfSharesEligibleToPurchaseDuringOfferingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Number Of Shares Eligible To Purchase During Offering Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Extinguishment of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Extinguishment of Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Losses on extinguishments of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Losses on extinguishments of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss on extinguishment of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Loss on extinguishment of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPaymentsMayAdjustToMaximumRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty interest payments may adjust to maximum rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPaymentsMayAdjustToMaximumRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Interest Payments May Adjust to Maximum Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPaymentsMayAdjustToMaximumRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty interest payments may adjust to maximum rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Disclosure of Cash Flow Information:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prime Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrimeRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prime Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Method Investments and Other Equity Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share attributable to common stockholders of BridgeBio, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetAcquisitionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Acquisition [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DecreaseInCashAndCashEquivalentsResultingFromDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Decrease in cash and cash equivalents resulting from deconsolidation of subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DecreaseInCashAndCashEquivalentsResultingFromDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Decrease In Cash And Cash Equivalents Resulting From Deconsolidation Of Entities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DecreaseInCashAndCashEquivalentsResultingFromDeconsolidationOfEntities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Decrease in cash and cash equivalents resulting from deconsolidation of entities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MarketBasedRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Market-Based Restricted Stock Units (RSUs) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MarketBasedRestrictedStockUnitsRsusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Market-Based Restricted Stock Units (RSUs).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedCostExpectedCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated charges to be incurred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedCostExpectedCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Cost, Expected Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedCostExpectedCost1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restructuring and Related Cost, Expected Cost, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided by (Used in) Investing Activities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario Forecast</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forecast [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Forecast</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock under public offerings, net, shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Vesting period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SatisfyTaxWithholdingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Satisfy Tax Withholding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SatisfyTaxWithholdingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Satisfy Tax Withholding [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SatisfyTaxWithholdingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Satisfy tax withholding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFollowingFDAApprovalOfTruseltiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment Following FDA Approval of Truseltiq</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFollowingFDAApprovalOfTruseltiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment Following F D A Approval Of Truseltiq [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentFollowingFDAApprovalOfTruseltiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment following FDA approval of Truseltiq.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyStockAndEquityAwardExchangeProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2020 Stock and Equity Award Exchange Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyStockAndEquityAwardExchangeProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020 Stock and Equity Award Exchange Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyStockAndEquityAwardExchangeProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Stock And Equity Award Exchange Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyStockAndEquityAwardExchangeProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty stock and equity award exchange program.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Conversion, Converted Instrument, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtConversionConvertedInstrumentSharesIssued1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, conversion, equivalent shares of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfPotentialMilestoneAmountsAndAccrualsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Potential Milestone Amounts and Accruals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfPotentialMilestoneAmountsAndAccrualsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Potential Milestone Amounts And Accruals Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfPotentialMilestoneAmountsAndAccrualsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of potential milestone amounts and accruals.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedFairValueOfOutstandingTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value of outstanding term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedFairValueOfOutstandingTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Fair Value of Outstanding Term Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedFairValueOfOutstandingTermLoan_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated fair value of outstanding term loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AttrubyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Attruby.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AttrubyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Attruby</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AttrubyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Attruby [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders' deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares issued in exchange of subsidiary equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Shares Issued In Exchange Of Subsidiary Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesIssuedInExchangeOfSubsidiaryEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares issued in exchange of subsidiary equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Marketable Securities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income (expense), net:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfBusinessSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of business segments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfBusinessSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Business Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfBusinessSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of business segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-controlling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, 2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Operating leases, Imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Operating leases, Imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2020 Capped Call Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capped Call Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Capped call transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Restricted Stock Units (RSUs)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInFifthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Year Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInFifthYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2030</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value, Outstanding, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accrued unpaid interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contractual interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebtExcludingAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Debt, Excluding Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction-related fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Fee Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssumedConversionOfTwoThousandTwentySevenNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assumed conversion of two thousand twenty seven notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssumedConversionOfTwoThousandTwentySevenNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assumed Conversion of 2027 Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AssumedConversionOfTwoThousandTwentySevenNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assumed Conversion Of Two Thousand Twenty Seven Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gondola Bio, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gondola Bio Llc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GondolaBioLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">GondolaBio, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value assets, transfers between Level 1, Level 2 or Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Transfers Between Level One Level Two Or Level Three Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value assets transfers between level one level two or level three amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finance lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finance Lease, Weighted Average Remaining Lease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total cost of revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Emerging Growth Company</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CostSharingCreditsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cost sharing credits received.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetarySettlementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone fixed monetary settlement amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderInterestPurchaseAndSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Royalty Obligation Under Interest Purchase and Sale Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderInterestPurchaseAndSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from royalty obligation under interest purchase and sale agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsFromRoyaltyObligationUnderInterestPurchaseAndSaleAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from royalty obligation under interest purchase and sale agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenEmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019 Employee Stock Purchase Plan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandNineteenEmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand nineteen employee stock purchase plan.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Money Market Funds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Intangible Assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedSettlementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Accrued Settlement Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedSettlementAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone accrued settlement amount.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average shares used in computing net loss per share attributable to common stockholders of BridgeBio, basic</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeidosBiomedicalResearchIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leidos Biomedical Research, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherDevelopmentProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Development Programs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherDevelopmentProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Development Programs [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherDevelopmentProgramsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other development programs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest Disclosure [Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligation, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligation, net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsAfterDeductingSalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceeds After Deducting Sales Agent Fees and Commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsAfterDeductingSalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net proceeds after deducting sales agent fees and commissions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsAfterDeductingSalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds after deducting sales agent fees and commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Equity Method Investments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Equity Method Investments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SupplementalAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SupplementalAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SupplementalAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Supplemental agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Offerings, Share Repurchase Program And Securities Purchase Agreement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public Offerings, Share Repurchase Program And Securities Purchase Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bayer consumer care AG and kyowa kirin Co., ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bayer Consumer Care AG and Kyowa Kirin Co., Ltd [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerConsumerCareAgAndKyowaKirinCoLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bayer Consumer Care AG and Kyowa Kirin Co., Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommonStockOptionsIssuedAndOutstandingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Options Issued and Outstanding</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommonStockOptionsIssuedAndOutstandingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock options issued and outstanding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Current Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Repurchase Program</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of restricted stock unit (RSU) shares to satisfy tax withholding, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accrued interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Loans Balances</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds issued from offerings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from issuance of common stock through Follow-on offering, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturities of marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale and Maturity of Marketable Securities</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers from (to) noncontrolling interests</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinanceLeaseInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Finance lease costs</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Nonconsolidated Investee [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfCashEquivalentsAndMarketableSecuritiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Cash Equivalent and Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentUnamortizedDiscountPremiumDebtIssuanceCostsAndExitFeesAccretion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument unamortized discount premium debt issuance costs and exit fees accretion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentUnamortizedDiscountPremiumDebtIssuanceCostsAndExitFeesAccretion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Unamortized Discount Premium Debt Issuance Costs And Exit Fees Accretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentUnamortizedDiscountPremiumDebtIssuanceCostsAndExitFeesAccretion_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Debt discount, issuance costs and exit fee accretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price per Option, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortization of Intangible Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfIntangibleAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Intangible Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AsiaPacificMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asia Pacific [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AsiaPacificMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">APAC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtIssuanceCostsIncurredDuringNoncashOrPartialNoncashTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unpaid issuance costs associated with term loan under Amended Financing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Life (years), Outstanding, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FundingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Funding Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FundingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Funding Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FundingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Funding Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentInKindPIKNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentInKindPIKNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment in Kind (PIK) Note [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccrualForMilestonesNotProbable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrual for milestones not probable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccrualForMilestonesNotProbable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrual for Milestones Not Probable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccrualForMilestonesNotProbable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrual for milestones not probable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Customer C.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CustomerCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Customer C</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-lived assets impairments and write-offs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Impairment loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment of long-lived assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Impairment, Long-Lived Asset, Held-for-Use, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidPublicOfferingIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid public offering issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidPublicOfferingIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unpaid Public Offering Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnpaidPublicOfferingIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unpaid public offering issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Amount Settlement in Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Accrued Amount Settlement In Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone accrued amount settlement in cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingActivityTransactionsWithNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Transactions with noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingActivityTransactionsWithNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Activity Transactions With Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FinancingActivityTransactionsWithNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing activity transactions with noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity security investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Employees And Non Employees Service Share Based Compensation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Employees And Non Employees Service Share Based Compensation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of employees and non-employees service share-based compensation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average discount rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Discount Rate [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WeightedAverageDiscountRateAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted-average discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RemainingBalanceInEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining balance in escrow accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RemainingBalanceInEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Balance in Escrow Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RemainingBalanceInEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining balance in escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepayment percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Prepayment Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrepaymentPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument prepayment percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Securities, Available-for-sale, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total marketable securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Option Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash And Cash Equivalents [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Milestone Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders&#8217; equity (deficit):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProjectAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Resilience PAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProjectAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Project Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProjectAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Project Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SofrPlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SOFR plus Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SofrPlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SOFR plus Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SofrPlusInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SOFR plus interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Group Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RedeemableConvertibleNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Convertible Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RedeemableConvertibleNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Convertible Noncontrolling Interests [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RedeemableConvertibleNoncontrollingInterestsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable convertible noncontrolling interests.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PurchaseOfCappedCalls_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchase of capped calls</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PurchaseOfCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of capped calls</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PurchaseOfCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Of Capped Calls</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PurchaseOfCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of capped calls.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Comprehensive loss attributable to redeemable convertible noncontrolling interests and noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comprehensive loss attributable to redeemable convertible noncontrolling interests and noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Comprehensive loss attributable to redeemable convertible noncontrolling interests and noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ManufacturingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Manufacturing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ManufacturingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Manufacturing Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ManufacturingAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Manufacturing agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Interest Entity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableInterestEntityLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedResearchAndDevelopmentLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued research and development liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedResearchAndDevelopmentLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Research And Development Liabilities Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedResearchAndDevelopmentLiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued research and development liabilities current.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase in cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Performance-Based RSAs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Restricted Stock Awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedRestrictedStockAwardsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based restricted stock awards.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Royalty Obligation Debt Discount and Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty obligation debt discount and issuance costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyObligationDebtDiscountAndIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Royalty obligation debt discount and issuance costs paid in cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestoneLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Milestone liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestoneLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Milestone Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MilestoneLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Milestone liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nonoperating Income (Expense) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NonoperatingIncomeExpenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income (Expense), Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ServiceAgreementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Service Agreement Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ServiceAgreementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Service agreement term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ServiceAgreementTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Agreement term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized net gains from investment</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Sale of Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfAccruedProfessionalAndOtherAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of accrued professional and other accrued liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfAccruedProfessionalAndOtherAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Accrued Professional and Other Accrued Liabilities Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfAccruedProfessionalAndOtherAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Accrued Professional and Other Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligations [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Future Minimum Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ContractualObligationFiscalYearMaturityScheduleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, Fiscal Year Maturity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LicenseAndServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and Services Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LicenseAndServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License and Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Operating and Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Operating and Nonoperating, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TradingArrangementSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trading arrangement securities sold.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TradingArrangementSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Arrangement Securities Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TradingArrangementSecuritiesSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading arrangement securities sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinExclusiveLicenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Kyowa Kirin Exclusive License</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinExclusiveLicenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Kyowa Kirin Exclusive License [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_KyowaKirinExclusiveLicenseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Kyowa kirin exclusive license.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashCurrentAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Current, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Loss from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuritiesSoldNotYetPurchasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Sold Not Yet Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuritiesSoldNotYetPurchasedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold, Not yet Purchased [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Public offering price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued, price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedTerminationCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued termination charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedTerminationCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Termination Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedTerminationCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued termination charges.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued professional services</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued Amount Settlement in Cash or stock at our sole discretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Accrued Amount Settlement In Cash Or Stock At Sole Discretion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneAccruedAmountSettlementInCashOrStockAtSoleDiscretion_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone accrued amount settlement in cash or stock at sole discretion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred royalty obligations, net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligations Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligations net.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold percentage of stock price trigger in measurement period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Threshold Percentage Of Stock Price Trigger In Measurement Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Threshold percentage of stock price trigger in measurement period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss attributable to common stockholders of BridgeBio</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsOfCarryingValueOfNoncontrollingInterestAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments of carrying value of noncontrolling interest additional paid-in capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsOfCarryingValueOfNoncontrollingInterestAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments Of Carrying Value Of Noncontrolling Interest Additional Paid In Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsOfCarryingValueOfNoncontrollingInterestAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments of carrying value of noncontrolling interest additional paid-in capital.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Remaining Contractual Life (years), Exercisable</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Aggregate Face Values and Fair Values of Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Rule10B51TradingPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rule 10b5-1 Trading Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Rule10B51TradingPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rule 10b5-1 Trading Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAdditionalMinimumQualifiedBalanceOnCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of additional minimum qualified balance on cash released from escrow accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAdditionalMinimumQualifiedBalanceOnCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Additional Minimum Qualified Balance on Cash Released from Escrow Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfAdditionalMinimumQualifiedBalanceOnCashReleasedFromEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of additional minimum qualified balance on cash released from escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavirePharmaIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Navire Pharma, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavirePharmaIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Navire Pharma Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavirePharmaIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Navire Pharma, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NavirePharmaIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Navire</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeidosBiomedicalResearchLicenseAndCooperativeResearchAndDevelopmentAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Leidos biomedical research license and cooperative research and development agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeidosBiomedicalResearchLicenseAndCooperativeResearchAndDevelopmentAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leidos Biomedical Research License And Cooperative Research And Development Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeidosBiomedicalResearchLicenseAndCooperativeResearchAndDevelopmentAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Leidos Biomedical Research License and Cooperative Research and Development Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessCombinationPotentialCashConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessCombinationPotentialCashConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination Potential Cash Consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BusinessCombinationPotentialCashConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business combination potential cash consideration.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Equity Method Investment, Distribution, Return of Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from special cash dividends received from investment in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OtherAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other accrued liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Value, Issued, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Preferred Stock, Value, Issued, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preferred Stock, Value, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Undesignated preferred stock, $0.001 par value; 25,000,000 shares authorized; no shares issued and outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization expenses, 2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Repayments of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Debt instrument prepaid includes final payment charge and prepayment fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repayment of the Cap Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayment of term loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Expenditures Incurred but Not yet Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CapitalExpendituresIncurredButNotYetPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unpaid property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Intangible assets less accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, cash equivalents and restricted cash at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, cash equivalents and restricted cash at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to additional paid in capital related to premium payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Additional Paid In Capital Related To Premium Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments to additional paid in capital related to premium payments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Bbp418RibitolForLgmd2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BBP-418 (ribitol) for LGMD2I/R9 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Bbp418RibitolForLgmd2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BBP-418 (ribitol) for LGMD2I/R9.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_Bbp418RibitolForLgmd2IR9Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BBP-418 (ribitol) for LGMD2I/R9</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioGeneTherapyLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BridgeBio Gene Therapy, LLC</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioGeneTherapyLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BridgeBio Gene Therapy, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Goods and Service [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of Revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Disposal Group, Including Discontinued Operation, Consideration</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Definitive agreement to sell</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationDueInNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligations [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Royalty Obligations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfRevenueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cost of Revenue [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostOfRevenueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cost of revenues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDividendsReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds received as special cash dividends</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of Credit Facility, Lender</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Lender [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommercialSupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commercial Supply Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommercialSupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commercial supply agreement member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommercialSupplyAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Commercial Supply Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PreTaxImpairmentGainLossOnAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-tax impairment loss on asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PreTaxImpairmentGainLossOnAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-tax Impairment Gain (Loss) on Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PreTaxImpairmentGainLossOnAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre-tax impairment gain (loss) on asset.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDebtNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from term loan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDebtNetOfIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from term loan under Amended Financing Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Inventories</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Inventory, Finished Goods, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InventoryFinishedGoods_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Finished goods</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash consideration paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Additional Interest in Subsidiaries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrentAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrentAssetStatementOfFinancialPositionExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Noncurrent, Statement of Financial Position [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Impairment Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseImpairmentLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impairment loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Offerings, Share Repurchase Program And Securities Purchase Agreement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public Offerings, Share Repurchase Program and Securities Purchase Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Shares Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Preferred Stock, Shares Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Agent Fees and Commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales agent fees and commissions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesAgentFeesAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales agent fees and commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Winding down, exit and other related costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Exit Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsPeriodForRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Performance-based milestone awards period for recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsPeriodForRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Performance Based Milestone Awards Period For Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PerformanceBasedMilestoneAwardsPeriodForRecognition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Performance based milestone awards period for recognition.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TrancheTwoAdvanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche 2 Advance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TrancheTwoAdvanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche Two Advance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TrancheTwoAdvanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche two advance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_VotingInterestEntityInvestmentThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of voting shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_VotingInterestEntityInvestmentThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Voting Interest Entity Investment Threshold Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_VotingInterestEntityInvestmentThresholdPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Voting interest entity investment threshold, percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Treasury stock, at cost; 7,597,172 shares as of June 30, 2025; 6,191,761 shares as of December 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Treasury Stock, Value, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Treasury Stock, Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Treasury Stock, Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TreasuryStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Treasury Stock, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableTerminationFeesForOtherExistingServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable related to termination fees for other existing services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableTerminationFeesForOtherExistingServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable Termination Fees for Other Existing Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PayableTerminationFeesForOtherExistingServices_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payable termination fees for other existing services.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated fair value of deferred royalty obligation, net embedded derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Royalty Obligation Net of Embedded Derivative Liability, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DeferredRoyaltyObligationNetOfEmbeddedDerivativeLiabilityFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred royalty obligation net of embedded derivative liability, fair value disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs including initial purchasers discounts, legal and other professional fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortized Cost Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale, Amortized Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfGrossAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Gross Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfGrossAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of gross accounts receivable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfGrossAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of gross accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentNetLeverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net leverage ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentNetLeverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Net Leverage Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentNetLeverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument net leverage ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnderwritingDiscountsAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">underwriting discounts and commissions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnderwritingDiscountsAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Underwriting Discounts and Commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_UnderwritingDiscountsAndCommissions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting discounts and commissions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InProcessResearchAndDevelopmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">IPR&amp;D</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InProcessResearchAndDevelopmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">In Process Research and Development [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stated interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Stated Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortization of Debt Issuance Costs and Discounts, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Issuance Costs and Discounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Over-Allotment Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OverAllotmentOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Over Allotment Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InitialTransactionPriceForLicenseAndCollaborationAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Initial transaction price for the license and collaboration agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InitialTransactionPriceForLicenseAndCollaborationAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Initial Transaction Price For License And Collaboration Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_InitialTransactionPriceForLicenseAndCollaborationAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Initial transaction price for license and collaboration agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioOncologyTherapeuticsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BridgeBio Oncology Therapeutics</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioOncologyTherapeuticsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bridge Bio Oncology Therapeutics [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioOncologyTherapeuticsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BridgeBio Oncology Therapeutics.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Temporary equity carrying amount net including portion attributable to noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity Carrying Amount Net Including Portion Attributable To Noncontrolling Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable convertible noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Temporary equity, beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Temporary equity, ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest payable beginning date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentDateOfFirstRequiredPayment1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Date of First Required Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Other Operating Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Operating Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price as percentage of lower of fair market value as of beginning or end of offering period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, 2027</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2022</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contractual Obligation, to be Paid, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remainder of 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Security, Excluded EPS Calculation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityNetIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Net Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityNetIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary Equity, net income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Stock Plans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockPlans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from common stock issuances under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-Average Exercise Price per Option, Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized debt discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, remainder period of 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCapitalizedPropertyAndEquipments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Capitalized Property And Equipments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCapitalizedPropertyAndEquipments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Capitalized Property And Equipments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfCapitalizedPropertyAndEquipments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of capitalized property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsDepositedToEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net proceeds deposited to escrow accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsDepositedToEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Proceeds Deposited to Escrow Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NetProceedsDepositedToEscrowAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net proceeds deposited to escrow accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted-Average Grant Date Fair Value, Ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted-Average Grant Date Fair Value, Beginning balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential Fixed Monetary Amount Settlement in Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Fixed Monetary Amount Settlement In Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone fixed monetary amount settlement in cash.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockPremiumOverLastReportedSalePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Premium over last reported sale price percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockPremiumOverLastReportedSalePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Premium Over Last Reported Sale Price Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SaleOfStockPremiumOverLastReportedSalePricePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock premium over last reported sale price percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfVariableInterestEntitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Variable Interest Entities [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfVariableInterestEntitiesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Interest Entity [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Estimated Shares Issuable Under Performance-Based Milestone Compensation Arrangements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Estimated Shares Issuable Performance Based Milestone Compensation Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Estimated Shares Issuable Performance Based Milestone Compensation Arrangement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated shares issuable performance based milestone compensation arrangement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of principal amount to be repurchased in fundamental change</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Principal Amount To Be Repurchased In Fundamental Change</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of principal amount to be repurchased in fundamental change.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Property, Plant and Equipment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other comprehensive loss:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Statement Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating leases, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Assets, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ThomasTrimarchiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thomas Trimarchi [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ThomasTrimarchiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thomas trimarchi.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForDispositionFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payment for disposition fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForDispositionFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment for Disposition Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_PaymentForDispositionFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment for disposition fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Inventory, Current [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Inventories Presented on Condensed Consolidated Balance Sheet</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Issuance costs associated with term loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment of debt discount and issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments of Financing Costs, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from term loan, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CommitmentsAndContingenciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and Contingencies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash Lease Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncash Lease Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NoncashLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncash lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of grantees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationNumberOfEmployeesAffected_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Plan Modification, Number of Grantees Affected</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionRatio1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentConvertibleConversionRatio1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Convertible, Conversion Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedCommercialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued commercial liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedCommercialLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued commercial liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedExitFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued exit fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedExitFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Exit Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AccruedExitFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued exit fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsUnrealizedLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsUnrealizedLosses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unrealized Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsUnrealizedLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents Unrealized Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashEquivalentsUnrealizedLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash Equivalents Unrealized Losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_ExchangeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Exchange [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation and Principles of Consolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summary of significant accounting policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary Of Significant Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SummaryOfSignificantAccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary Of Significant Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNoncurrentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Issuance Costs, Noncurrent, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNoncurrentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs allocated to liability component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNoncurrentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Noncurrent, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt issuance costs allocated to equity component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnChangeInFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) On Change In Fair Value Of Embedded Derivative Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnChangeInFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain (loss) on change in fair value of embedded derivative liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_GainLossOnChangeInFairValueOfEmbeddedDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain for change in fair value of embedded derivative liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds received from asset sale transactions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds Received from Asset Sale Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ProceedsReceivedFromAssetSaleTransactions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds received from asset sale transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Value, Issued, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Value, Issued, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Common Stock, Value, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.001 par value; 500,000,000 shares authorized; 198,759,831 shares issued and 191,162,659 shares outstanding as of June 30, 2025, 196,236,234 shares issued and 190,044,473 shares outstanding as of December 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetAcquisitionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Acquisition [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Employee Related Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation and benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Employee Related Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on sale of certain assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Disposition of Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnDispositionOfAssets1_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss) on Disposition of Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring, impairment and related charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringSettlementAndImpairmentProvisions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring, Settlement and Impairment Provisions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash Equivalents, Estimated Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Cash Equivalents, Estimated Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Denomination of the principal amount of debt in consideration conversion of the notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Principal Amount Denomination For Conversion Into Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument principal amount denomination for conversion into common stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCashAndCashEquivalentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Cash And Cash Equivalents [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCashAndCashEquivalentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sales of investments in equity securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromSaleOfEquitySecuritiesFvNi_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Sale of Equity Securities, FV-NI</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Regulatory Milestone Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory milestone payment received.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryMilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regulatory milestone payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ChildrenIntendedForTreatmentWithCanavanDiseaseMaximumAge_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Children Intended for Treatment With Canavan Disease Maximum Age</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ChildrenIntendedForTreatmentWithCanavanDiseaseMaximumAge_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Children intended for treatment with canavan disease maximum age.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ChildrenIntendedForTreatmentWithCanavanDiseaseMaximumAge_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Children intended for treatment with Canavan Disease, under the age</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentOfferingDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument issuance date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentOfferingDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Offering Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandAndTwentyFiveNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 Note</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandAndTwentyFiveNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand and Twenty Five Note [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandAndTwentyFiveNoteMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and twenty five note.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesMilestonesPaymentsReceivableUponTheAchievement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Milestones Payments Receivable Upon the Achievement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesMilestonesPaymentsReceivableUponTheAchievement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales milestones payments receivable upon the achievement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_SalesMilestonesPaymentsReceivableUponTheAchievement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales milestones payments receivable upon the achievement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndRestrictedCashMaturityPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash cash equivalents and restricted cash maturity period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndRestrictedCashMaturityPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents And Restricted Cash Maturity Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_CashCashEquivalentsAndRestrictedCashMaturityPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, cash equivalents and restricted cash maturity period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrBrianStephensonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dr. Brian Stephenson.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrBrianStephensonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dr Brian Stephenson [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DrBrianStephensonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dr. Brian Stephenson [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contingent Consideration Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContingentConsiderationTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contingent Consideration Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByMeasurementFrequencyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 8)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization expenses, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization expenses, 2022</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Finite-Lived Intangible Assets, Amortization Expense, Next Rolling 12 Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFiveCappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Capped Call Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFiveCappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Capped Call Transactions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_TwoThousandTwentyFiveCappedCallTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2025 Capped Call Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesCoveredByCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares covered by capped calls</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesCoveredByCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Shares Covered By Capped Calls</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfSharesCoveredByCappedCalls_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares covered by capped calls.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Supplemental Information Related to Remaining Lease Term and Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Supplemental Information Related To Remaining Lease Term And Discount Rate Table [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of supplemental information related to remaining lease term and discount rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average shares used in computing net loss per share attributable to common stockholders of BridgeBio, diluted</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Receivables from licensing and collaboration agreements</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentCumulativeAccruedInterestConvertibleIntoPrincipal_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cumulative accrued interest convertible into principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Difference recognized in equity</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MinorityInterestDecreaseFromRedemptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentCappedCallTransactionCapPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capped call transaction, cap price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentCappedCallTransactionCapPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Capped Call Transaction Cap Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DebtInstrumentCappedCallTransactionCapPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument capped call transaction cap price per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating leases, Total future minimum lease payments</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_OriginAndSentynlTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Origin and sentynl therapeutics, inc.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfCustomersAccountedForMoreThanTenPercentageOfConcentrationRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of customers accounted for more than ten percentage of concentration risk.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_NumberOfCustomersAccountedForMoreThanTenPercentageOfConcentrationRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of customers accounted for more than 10% of concentration risk</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_EstimatedSharesIssuableEmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Estimated shares issuable employee stock purchase plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdrenasTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Adrenas</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdrenasTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adrenas Therapeutics Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_AdrenasTherapeuticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adrenas Therapeutics Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FoundationMedicineIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foundation Medicine Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_FoundationMedicineIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foundation Medicine, Inc</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RoyaltyInterestPaymentsEqualToCapAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Royalty interest payments equal to cap amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BridgeBioPharmaLimitedLiabilityCompanyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BridgeBio Pharma, LLC</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_ResilienceAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Resilience Agreements</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConvertibleLongTermNotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Convertible Notes Payable, Noncurrent</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RestrictedStockUnitsRSUsAndRestrictedStockAwardsRSAsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted stock units (rsus) and restricted stock awards (rsas).</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_BayerExclusiveLicenseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bayer Exclusive License Agreement.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_MinimumThresholdPercentageOfAggregatePrincipalByTrusteeOrHolders_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum threshold percentage of aggregate principal by trustee or holders.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockCompensationPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Compensation Plans</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WhollyOwnedSubsidiaryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eidos</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_WhollyOwnedSubsidiaryDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Wholly Owned Subsidiary Disclosure.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total financial liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_LeaseAgreementsAndLettersOfCreditMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease agreements and letters of credit.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_RegulatoryBasedMilestonePayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Regulatory based milestone payment.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="bbio_DepositaryFeesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depositary fees per share</link:label>
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  <xsd:element id="bbio_PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange" name="PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentMarketCapitalizationAmount" name="DebtInstrumentMarketCapitalizationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_RoyaltyObligationsMember" name="RoyaltyObligationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PercentageOfSalesAgentsCommissionsOnGrossProceedsOfSalesOfCommonStock" name="PercentageOfSalesAgentsCommissionsOnGrossProceedsOfSalesOfCommonStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RandalWScottMember" name="RandalWScottMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInStock" name="PotentialMilestoneFixedMonetaryAmountSettlementInStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_AgreementToPayRemainingPayableAmount" name="AgreementToPayRemainingPayableAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_RegulatoryAndSalesMilestonePaymentsEligibleToReceive" name="RegulatoryAndSalesMilestonePaymentsEligibleToReceive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_MarketBasedRestrictedStockUnitsRsusMember" name="MarketBasedRestrictedStockUnitsRsusMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_GainLossOnDeconsolidationOfEntities" name="GainLossOnDeconsolidationOfEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CommercialSupplyAgreementMember" name="CommercialSupplyAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_UpfrontNonrefundablePaymentReceived" name="UpfrontNonrefundablePaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_RedeemableConvertibleNoncontrollingInterestsMember" name="RedeemableConvertibleNoncontrollingInterestsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfDeferredRoyaltyObligationsNetTableTextBlock" name="ScheduleOfDeferredRoyaltyObligationsNetTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_IssuanceRepurchaseOfNoncontrollingInterest" name="IssuanceRepurchaseOfNoncontrollingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AccruedRebatesAndOtherRelatedCosts" name="AccruedRebatesAndOtherRelatedCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_MaximumPercentageOfEmployeePayrollDeductionForStockPurchase" name="MaximumPercentageOfEmployeePayrollDeductionForStockPurchase" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_MaximumNumberOfSharesEligibleToPurchaseDuringOfferingPeriod" name="MaximumNumberOfSharesEligibleToPurchaseDuringOfferingPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PerformanceBasedMilestoneAwardsCompensationExpenseSettledWithEquity" name="PerformanceBasedMilestoneAwardsCompensationExpenseSettledWithEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PercentageOfPurchasePriceEqualToHardCap" name="PercentageOfPurchasePriceEqualToHardCap" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RegulatoryMilestonePaymentsReceived" name="RegulatoryMilestonePaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_OneTimeFeesReceivableNoncurrent" name="OneTimeFeesReceivableNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_OnetimePaymentAmountPaidToPurchasers" name="OnetimePaymentAmountPaidToPurchasers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCash" name="PotentialMilestoneFixedMonetaryAmountSettlementInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ShareBasedPaymentArrangementConsecutiveTradingDays" name="ShareBasedPaymentArrangementConsecutiveTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PerformanceBasedStockOptionsMember" name="PerformanceBasedStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DrBrianStephensonMember" name="DrBrianStephensonMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ProceedsFromRoyaltyObligationUnderFundingAgreement" name="ProceedsFromRoyaltyObligationUnderFundingAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ProceedsFromSaleOfPriorityReviewVoucher" name="ProceedsFromSaleOfPriorityReviewVoucher" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_QEDTherapeuticsIncMember" name="QEDTherapeuticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationNetOfEmbeddedDerivativeLiabilityFairValueDisclosure" name="DeferredRoyaltyObligationNetOfEmbeddedDerivativeLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PotentialMilestoneFixedMonetaryAmountSettlementInCashOrStockAtSoleDiscretion" name="PotentialMilestoneFixedMonetaryAmountSettlementInCashOrStockAtSoleDiscretion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DebtInstrumentConvertibleThresholdBusinessDays" name="DebtInstrumentConvertibleThresholdBusinessDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AccruedCompensationAndBenefitsMember" name="AccruedCompensationAndBenefitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_Accruedexitfeesforresearchanddevelopment" name="Accruedexitfeesforresearchanddevelopment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_TwoThousandTwentyOneCappedCallTransactionsMember" name="TwoThousandTwentyOneCappedCallTransactionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_CashEquivalentsAndMarketableSecuritiesAbstract" name="CashEquivalentsAndMarketableSecuritiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentAmortizationPaymentDate" name="DebtInstrumentAmortizationPaymentDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_UnderwritingDiscountsAndCommissions" name="UnderwritingDiscountsAndCommissions" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_BusinessAcquisitionCashPerShare" name="BusinessAcquisitionCashPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TemporaryEquityTransferToFromNoncontrollingInterest" name="TemporaryEquityTransferToFromNoncontrollingInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_IncrementalTermLoanMember" name="IncrementalTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EidosTherapeuticsIncMember" name="EidosTherapeuticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PotentialMilestoneAccruedSettlementAmount" name="PotentialMilestoneAccruedSettlementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_AspaTherapeuticsIncMember" name="AspaTherapeuticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RecognizedIntangibleAssetRecordedToOtherCurrentLiabilities" name="RecognizedIntangibleAssetRecordedToOtherCurrentLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_BayerConsumerCareAgAndKyowaKirinCoLtdMember" name="BayerConsumerCareAgAndKyowaKirinCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments" name="AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_MilestoneLiability" name="MilestoneLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PotentialSalesMilestonePayments" name="PotentialSalesMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PercentageOfAggregateAmountNotExceedTheOriginalNetCashProceedsReceivedFromAssetSaleTransactions" name="PercentageOfAggregateAmountNotExceedTheOriginalNetCashProceedsReceivedFromAssetSaleTransactions" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PublicOfferingsAndShareRepurchaseProgramAndSecuritiesPurchaseAgreementAbstract" name="PublicOfferingsAndShareRepurchaseProgramAndSecuritiesPurchaseAgreementAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_IncrementalCompensationCostForAwardsModification" name="IncrementalCompensationCostForAwardsModification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_RestrictedStockUnitsRSUsAndRestrictedStockAwardsRSAsMember" name="RestrictedStockUnitsRSUsAndRestrictedStockAwardsRSAsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EmployeeAndNonEmployeeServiceShareBasedCompensationLineItems" name="EmployeeAndNonEmployeeServiceShareBasedCompensationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_GainLossOnChangeInFairValueOfEmbeddedDerivativeLiability" name="GainLossOnChangeInFairValueOfEmbeddedDerivativeLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PercentageOfAutomaticAnnualIncreaseInNumberOfSharesReservedForFutureIssuance" name="PercentageOfAutomaticAnnualIncreaseInNumberOfSharesReservedForFutureIssuance" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PayableTerminationFeesForOtherExistingServices" name="PayableTerminationFeesForOtherExistingServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AssumedConversionOfTwoThousandTwentyNineNotesMember" name="AssumedConversionOfTwoThousandTwentyNineNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NumberOfEqualMonthlyInstallments" name="NumberOfEqualMonthlyInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentPrepaymentPremiumPercentage" name="DebtInstrumentPrepaymentPremiumPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentPaymentAmortizationDate" name="DebtInstrumentPaymentAmortizationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DeferredRoyaltyObligations" name="DeferredRoyaltyObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_OtherRSAsMember" name="OtherRSAsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RegulatoryMilestonePaymentReceived" name="RegulatoryMilestonePaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DrNeilKumarMember" name="DrNeilKumarMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PotentialMilestoneFixedMonetarySettlementAmount" name="PotentialMilestoneFixedMonetarySettlementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PercentageOfNetVestedSharesOfCommonStockToBeIssued" name="PercentageOfNetVestedSharesOfCommonStockToBeIssued" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PayableRelatedToManufacturingSuite" name="PayableRelatedToManufacturingSuite" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_UnvestedRestrictedStockUnitMember" name="UnvestedRestrictedStockUnitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PercentageOfRoyaltyPaymentEqualToAnnualCap" name="PercentageOfRoyaltyPaymentEqualToAnnualCap" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_FrankMccormickMember" name="FrankMccormickMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PotentialMilestoneAccruedAmountSettlementInStock" name="PotentialMilestoneAccruedAmountSettlementInStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PotentialRegulatoryMilestonePayments" name="PotentialRegulatoryMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CashPurchasedPrice" name="CashPurchasedPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_FinancingActivityTransactionsWithNoncontrollingInterests" name="FinancingActivityTransactionsWithNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DebtInstrumentMaturityDateExtension" name="DebtInstrumentMaturityDateExtension" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RoyaltyPurchaseAgreementMember" name="RoyaltyPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RegulatoryMilestonePayment" name="RegulatoryMilestonePayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_WeightedAverageDiscountRateAbstract" name="WeightedAverageDiscountRateAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AcoramidisForAttrCmMember" name="AcoramidisForAttrCmMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_FinancingAgreementMember" name="FinancingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_GondolaBioLimitedLiabiltyCompanyMember" name="GondolaBioLimitedLiabiltyCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SatisfyTaxWithholdingMember" name="SatisfyTaxWithholdingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EqualMonthlyInstallmentsAmount" name="EqualMonthlyInstallmentsAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_TemporaryEquityDeconsolidationOfEntities" name="TemporaryEquityDeconsolidationOfEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember" name="TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TheRasIncMember" name="TheRasIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_HerculesCapitalIncMember" name="HerculesCapitalIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SiliconValleyBankAndHerculesLoanMember" name="SiliconValleyBankAndHerculesLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_InLicensingAndOtherResearchAndDevelopmentAgreementsAbstract" name="InLicensingAndOtherResearchAndDevelopmentAgreementsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationsNet" name="DeferredRoyaltyObligationsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_RegulatoryMilestonePaymentReceivableSubjectToAchievementOfRegulatorMilestones" name="RegulatoryMilestonePaymentReceivableSubjectToAchievementOfRegulatorMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ExitFees" name="ExitFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable" name="ScheduleOfEmployeesAndNonEmployeesServiceShareBasedCompensationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DirectOfferingExpense" name="DirectOfferingExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_LicenseAgreementMember" name="LicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TwoThousandNineteenStockOptionAndIncentivePlanAndInducementEquityPlanMember" name="TwoThousandNineteenStockOptionAndIncentivePlanAndInducementEquityPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests" name="TemporaryEquityCarryingAmountNetIncludingPortionAttributableToNoncontrollingInterests" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationNet" name="DeferredRoyaltyObligationNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_InitialTermLoanMember" name="InitialTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NetProductRevenueMember" name="NetProductRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ProceedsFromRoyaltyObligationUnderRoyaltyPurchaseAgreement" name="ProceedsFromRoyaltyObligationUnderRoyaltyPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss" name="NetIncomeLossExcludingRedeemableNoncontrollingInterestsNetIncomeLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_LicenseAndCollaborationAgreementTextBlock" name="LicenseAndCollaborationAgreementTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_LeaseAgreementExpiration" name="LeaseAgreementExpiration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentAccruedInterestConvertibleIntoPrincipal" name="DebtInstrumentAccruedInterestConvertibleIntoPrincipal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesExercised" name="DebtInstrumentOptionToPurchaseAdditionalNotesExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PercentageOfUnderwritersCommissionsOnGrossProceedsOfSalesOfCommonStock" name="PercentageOfUnderwritersCommissionsOnGrossProceedsOfSalesOfCommonStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CustomerCMember" name="CustomerCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod" name="ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PreTaxImpairmentGainLossOnAsset" name="PreTaxImpairmentGainLossOnAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts" name="ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TheRasIncorporatedMember" name="TheRasIncorporatedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AllocationOfTransactionPriceToLicenses" name="AllocationOfTransactionPriceToLicenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_TerminationAgreementMember" name="TerminationAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AccruedResearchAndDevelopmentLiabilitiesCurrent" name="AccruedResearchAndDevelopmentLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_WarrantToPurchaseSharesOfCommonStock" name="WarrantToPurchaseSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TwoThousandTwentyThreeAtTheMarketAgreementMember" name="TwoThousandTwentyThreeAtTheMarketAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AccruedProfessionalAndOtherAccruedLiabilitiesPolicyPolicyTextBlock" name="AccruedProfessionalAndOtherAccruedLiabilitiesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CommonStockHeld" name="CommonStockHeld" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentsMaturityYear" name="DebtInstrumentsMaturityYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember" name="TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable" name="PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_OtherConsolidatedEntitiesMember" name="OtherConsolidatedEntitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TwoThousandNineteenStockOptionAndIncentivePlanMember" name="TwoThousandNineteenStockOptionAndIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfProvisionForIncomeTaxesAndTheEffectiveTaxRatesTableTextBlock" name="ScheduleOfProvisionForIncomeTaxesAndTheEffectiveTaxRatesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CostSharingCreditsReceived" name="CostSharingCreditsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_FoundationMedicineDiagnosticsAgreementMember" name="FoundationMedicineDiagnosticsAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentDepositPercentageOfProceedsNetOfCertainPermittedCostsUponReceiptOfUpfrontPaymentsFromLicenseAgreements" name="DebtInstrumentDepositPercentageOfProceedsNetOfCertainPermittedCostsUponReceiptOfUpfrontPaymentsFromLicenseAgreements" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock" name="DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CostOfLicenseServicesAndRoyaltyRevenueMember" name="CostOfLicenseServicesAndRoyaltyRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_KyowaKirinCoLtdMember" name="KyowaKirinCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RoyaltyObligationDebtIssuanceCosts" name="RoyaltyObligationDebtIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TradingArrangementSecuritiesSold" name="TradingArrangementSecuritiesSold" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RegulatoryAndSalesMilestones" name="RegulatoryAndSalesMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_LicenseFees" name="LicenseFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationsAbstract" name="DeferredRoyaltyObligationsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NumberOfCustomersAccountedForMoreThanTenPercentageOfConcentrationRisk" name="NumberOfCustomersAccountedForMoreThanTenPercentageOfConcentrationRisk" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PotentialMilestoneAccruedAmountSettlementInCash" name="PotentialMilestoneAccruedAmountSettlementInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_EquityMethodAndCostMethodInvestmentAbstract" name="EquityMethodAndCostMethodInvestmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PerformanceBasedMilestoneAwardsPeriodForRecognition" name="PerformanceBasedMilestoneAwardsPeriodForRecognition" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_StanfordLicenseAgreementMember" name="StanfordLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentConvertibleThresholdConsecutiveTradingDayPeriod" name="DebtInstrumentConvertibleThresholdConsecutiveTradingDayPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RepaymentOfDeferredRoyaltyObligation" name="RepaymentOfDeferredRoyaltyObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_LeaseAgreementsAndLettersOfCreditMember" name="LeaseAgreementsAndLettersOfCreditMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BusinessAcquisitionEquityInterestsIssuedOrIssuableFairValue" name="BusinessAcquisitionEquityInterestsIssuedOrIssuableFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AdjustmentsOfCarryingValueOfNoncontrollingInterestAdditionalPaidInCapital" name="AdjustmentsOfCarryingValueOfNoncontrollingInterestAdditionalPaidInCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AttrubyMember" name="AttrubyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement" name="IssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CustomerEMember" name="CustomerEMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentPrepaymentPercentage" name="DebtInstrumentPrepaymentPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AccruedRegulatoryBasedMilestonePayment" name="AccruedRegulatoryBasedMilestonePayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CashEquivalentsUnrealizedLosses" name="CashEquivalentsUnrealizedLosses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_BayerMember" name="BayerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_UnvestedRestrictedStockAwardMember" name="UnvestedRestrictedStockAwardMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_KyowaKirinExclusiveLicenseMember" name="KyowaKirinExclusiveLicenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DevelopmentAndRegulatoryMilestonePaymentsYetToBeReceived" name="DevelopmentAndRegulatoryMilestonePaymentsYetToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AccruedCommercialLiabilities" name="AccruedCommercialLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PercentageOfAdditionalMinimumQualifiedBalanceOnCashReleasedFromEscrowAccounts" name="PercentageOfAdditionalMinimumQualifiedBalanceOnCashReleasedFromEscrowAccounts" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ProceedsReceivedFromAssetSaleTransactions" name="ProceedsReceivedFromAssetSaleTransactions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_VotingInterestEntityInvestmentThresholdPercentage" name="VotingInterestEntityInvestmentThresholdPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_NumberOfSharesCoveredByCappedCalls" name="NumberOfSharesCoveredByCappedCalls" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CostOfLicenseAndServicesRevenueMember" name="CostOfLicenseAndServicesRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RoyaltyRevenueMember" name="RoyaltyRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PerformanceBasedMilestoneAwardsMember" name="PerformanceBasedMilestoneAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SaleOfNonfinancialAssetsTextBlock" name="SaleOfNonfinancialAssetsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_NumberOfPerformanceBasedRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity" name="NumberOfPerformanceBasedRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RegularEquityProgramMember" name="RegularEquityProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NavireBmsMember" name="NavireBmsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NumberOfBusinessSegments" name="NumberOfBusinessSegments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_SupranationalDebtSecuritiesMember" name="SupranationalDebtSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AgreementAndPlanOfMergerMember" name="AgreementAndPlanOfMergerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_CustomerAMember" name="CustomerAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NetProceedsAfterDeductingSalesAgentFeesAndCommissions" name="NetProceedsAfterDeductingSalesAgentFeesAndCommissions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_LesseeOperatingAndFinancingLeasesDisclosureTextBlock" name="LesseeOperatingAndFinancingLeasesDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_UpfrontPaymentsReceived" name="UpfrontPaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_FundingPaymentReceivedNetOfCertainTransactionExpenses" name="FundingPaymentReceivedNetOfCertainTransactionExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_BristolMyersSquibbCompanyMember" name="BristolMyersSquibbCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_UpfrontPaymentYetToBeReceived" name="UpfrontPaymentYetToBeReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PriorityReviewVoucherMember" name="PriorityReviewVoucherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_WeightedAverageRemainingLeaseTermAbstract" name="WeightedAverageRemainingLeaseTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_UnpaidIssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement" name="UnpaidIssuanceCostsAssociatedWithRoyaltyObligationUnderRoyaltyPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PercentageOfOwnershipReducedForPrivateEquityFinancing" name="PercentageOfOwnershipReducedForPrivateEquityFinancing" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_LeidosBiomedicalResearchLicenseAndCooperativeResearchAndDevelopmentAgreementsMember" name="LeidosBiomedicalResearchLicenseAndCooperativeResearchAndDevelopmentAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ConvertibleSeniorNotes" name="ConvertibleSeniorNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_UnvestedMarketBasedRestrictedStockUnitMember" name="UnvestedMarketBasedRestrictedStockUnitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AdrenasTherapeuticsIncMember" name="AdrenasTherapeuticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_MinimumPurchaseCommitment" name="MinimumPurchaseCommitment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PrincipleAmountPaidToLenders" name="PrincipleAmountPaidToLenders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_BaseRatePlusInterestMember" name="BaseRatePlusInterestMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PotentialMilestonePayments" name="PotentialMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_RoyaltyInterestPaymentsMayAdjustToMaximumRate" name="RoyaltyInterestPaymentsMayAdjustToMaximumRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CostOfGoodsSoldMember" name="CostOfGoodsSoldMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_FundingAgreementMember" name="FundingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember" name="EstimatedSharesIssuablePerformanceBasedMilestoneCompensationArrangementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AnnualNetSales" name="AnnualNetSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_NetProceedsDepositedToEscrowAccounts" name="NetProceedsDepositedToEscrowAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_BridgeBioOncologyTherapeuticsMember" name="BridgeBioOncologyTherapeuticsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ThomasTrimarchiMember" name="ThomasTrimarchiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TwoThousandTwentyStockAndEquityAwardExchangeProgramMember" name="TwoThousandTwentyStockAndEquityAwardExchangeProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RegulatoryBasedMilestonePayment" name="RegulatoryBasedMilestonePayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_SupplementalAgreementMember" name="SupplementalAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_UpfrontPaymentReceived" name="UpfrontPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ManufacturingAgreementMember" name="ManufacturingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SellerPartiesMember" name="SellerPartiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SalesMilestonesPaymentsReceivableUponTheAchievement" name="SalesMilestonesPaymentsReceivableUponTheAchievement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_NumberOfSharesIssuedInExchangeOfSubsidiaryEquity" name="NumberOfSharesIssuedInExchangeOfSubsidiaryEquity" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentPotentialPaymentExtendedAmortizationDate" name="DebtInstrumentPotentialPaymentExtendedAmortizationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AggregateMinimumCommitment" name="AggregateMinimumCommitment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_AlexionMember" name="AlexionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SofrPlusInterestMember" name="SofrPlusInterestMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EstimatedSharesIssuableEmployeeStockPurchasePlanMember" name="EstimatedSharesIssuableEmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BayerLicenseAgreementsMember" name="BayerLicenseAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AssumedConversionOfTwoThousandThirtyOneNotesMember" name="AssumedConversionOfTwoThousandThirtyOneNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentUnamortizedDiscountPremiumDebtIssuanceCostsAndExitFeesAccretion" name="DebtInstrumentUnamortizedDiscountPremiumDebtIssuanceCostsAndExitFeesAccretion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised" name="DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_ScheduleOfCashEquivalentsAndMarketableSecuritiesTableTextBlock" name="ScheduleOfCashEquivalentsAndMarketableSecuritiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationUnderFundingAgreementNetOfEmbeddedDerivativeLiabilityFairValueDisclosure" name="DeferredRoyaltyObligationUnderFundingAgreementNetOfEmbeddedDerivativeLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_KKCLicenseAgreementsMember" name="KKCLicenseAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_MergerTransactionsCompletionDate" name="MergerTransactionsCompletionDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ScheduleOfAccruedProfessionalAndOtherAccruedLiabilitiesTableTextBlock" name="ScheduleOfAccruedProfessionalAndOtherAccruedLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CashAndCashEquivalentsFairValueDisclosureAbstract" name="CashAndCashEquivalentsFairValueDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TwoThousandSixteenEquityIncentivePlanAndTwoThousandEighteenStockOptionAndIncentivePlanMember" name="TwoThousandSixteenEquityIncentivePlanAndTwoThousandEighteenStockOptionAndIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BayerExclusiveLicenseAgreementMember" name="BayerExclusiveLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DecreaseInCashAndCashEquivalentsResultingFromDeconsolidationOfEntities" name="DecreaseInCashAndCashEquivalentsResultingFromDeconsolidationOfEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_DebtInstrumentOptionToPurchaseAdditionalNotes" name="DebtInstrumentOptionToPurchaseAdditionalNotes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_OtherDevelopmentProgramsMember" name="OtherDevelopmentProgramsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentNetLeverageRatio" name="DebtInstrumentNetLeverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AssetsRecognizedInRelationToMilestonePayments" name="AssetsRecognizedInRelationToMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_UnpaidPublicOfferingIssuanceCosts" name="UnpaidPublicOfferingIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_EstimatedFairValueOfOutstandingTermLoan" name="EstimatedFairValueOfOutstandingTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PercentageOfRoyaltyInterestPaymentsOnNetSales" name="PercentageOfRoyaltyInterestPaymentsOnNetSales" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DepositaryFeesPerShare" name="DepositaryFeesPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TransitionServiceAgreementAndSubleaseAgreementMember" name="TransitionServiceAgreementAndSubleaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentCappedCallTransactionCapPricePerShare" name="DebtInstrumentCappedCallTransactionCapPricePerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ExitCost" name="ExitCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_RoyaltyInterestPayable" name="RoyaltyInterestPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_PotentialMilestoneAccruedAmountSettlementInCashOrStockAtSoleDiscretion" name="PotentialMilestoneAccruedAmountSettlementInCashOrStockAtSoleDiscretion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_WhollyOwnedSubsidiaryDisclosureTextBlock" name="WhollyOwnedSubsidiaryDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AgencyDiscountNotesMember" name="AgencyDiscountNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfNonvestedRestrictedStockUnitsAndRestrictedStockAwardsActivityTableTextBlock" name="ScheduleOfNonvestedRestrictedStockUnitsAndRestrictedStockAwardsActivityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PrepaymentFee" name="PrepaymentFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_Bbp418RibitolForLgmd2IR9Member" name="Bbp418RibitolForLgmd2IR9Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_OtherAccruedLiabilitiesMember" name="OtherAccruedLiabilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_GondolaBioLlcMember" name="GondolaBioLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_LelandStanfordJuniorUniversityMember" name="LelandStanfordJuniorUniversityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfInterestExpenseRecognizedAndEffectiveInterestRatesRelatedToNotesTableTextBlock" name="ScheduleOfInterestExpenseRecognizedAndEffectiveInterestRatesRelatedToNotesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ScheduleOfFutureMinimumLeasePaymentsForNoncancelableOperatingAndFinanceLeasesTableTextBlock" name="ScheduleOfFutureMinimumLeasePaymentsForNoncancelableOperatingAndFinanceLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_LicenseRevenueMember" name="LicenseRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_SpecialCashDividendDeclaredPerShare" name="SpecialCashDividendDeclaredPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_InLicensingAndOtherResearchAndDevelopmentAgreementsDisclosureTextBlock" name="InLicensingAndOtherResearchAndDevelopmentAgreementsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CappedCallTransactionsMember" name="CappedCallTransactionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AggregateCashProceedsContributedFromRelatedParty" name="AggregateCashProceedsContributedFromRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_ExclusiveLicenseAgreementsWithBayerConsumerCareAgAndKyowaKirinCoLtdMember" name="ExclusiveLicenseAgreementsWithBayerConsumerCareAgAndKyowaKirinCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ShareBasedPaymentArrangementPerformancePeriodFromDateOfGrant" name="ShareBasedPaymentArrangementPerformancePeriodFromDateOfGrant" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount" name="FairValueAssetsTransfersBetweenLevelOneLevelTwoOrLevelThreeAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock" name="ScheduleOfSupplementalInformationRelatedToRemainingLeaseTermAndDiscountRateTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_NavirePharmaIncMember" name="NavirePharmaIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PerformanceBasedRestrictedStockUnitsMember" name="PerformanceBasedRestrictedStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BridgeBioPharmaLimitedLiabilityCompanyMember" name="BridgeBioPharmaLimitedLiabilityCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NumberOfRestrictedStockUnitsIssuedInExchangeOfSubsidiaryEquity" name="NumberOfRestrictedStockUnitsIssuedInExchangeOfSubsidiaryEquity" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationsLineItems" name="DeferredRoyaltyObligationsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_NumberOfRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity" name="NumberOfRestrictedStockAwardsIssuedInExchangeOfSubsidiaryEquity" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_CashCashEquivalentsAndMarketableSecuritiesPolicyTextBlock" name="CashCashEquivalentsAndMarketableSecuritiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ShortTermLiabilityFairValueDisclosure" name="ShortTermLiabilityFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_LicenseAndServicesRevenueMember" name="LicenseAndServicesRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction" name="DebtInstrumentMandatoryPrepaymentsPercentageOfNetCashProceedsFromPrepaymentEventTransaction" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_AlexionLicenseAgreementsMember" name="AlexionLicenseAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_TwoThousandNineteenEmployeeStockPurchasePlanMember" name="TwoThousandNineteenEmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PerformanceBasedRestrictedStockAwardsMember" name="PerformanceBasedRestrictedStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_CostSharingCreditOfTheLesserOfFixedPercentageOfCertainAgreedUponServiceCosts" name="CostSharingCreditOfTheLesserOfFixedPercentageOfCertainAgreedUponServiceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_EntitiesAffiliatedWithPerceptiveLifeSciencesMasterFundLtdMember" name="EntitiesAffiliatedWithPerceptiveLifeSciencesMasterFundLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DeconsolidationOfSubsidiary" name="DeconsolidationOfSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_StockIssuedWithPremium" name="StockIssuedWithPremium" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_AccruedExitFees" name="AccruedExitFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_DebtInstrumentConvertibleIncreaseInConversionRateNumberOfCommonStockIssuable" name="DebtInstrumentConvertibleIncreaseInConversionRateNumberOfCommonStockIssuable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TrancheOneAdvanceMember" name="TrancheOneAdvanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_EquityMethodAndOtherEquityInvestmentsPolicyTextBlock" name="EquityMethodAndOtherEquityInvestmentsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_TwoThousandTwentyOneStockOptionAndIncentivePlanMember" name="TwoThousandTwentyOneStockOptionAndIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_CostRelatedToManufacturingSuiteAndAdditionalEquipment" name="CostRelatedToManufacturingSuiteAndAdditionalEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TemporaryEquityIssuanceRepurchaseOfNoncontrollingInterestValue" name="TemporaryEquityIssuanceRepurchaseOfNoncontrollingInterestValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PercentageOfGrossAccountsReceivable" name="PercentageOfGrossAccountsReceivable" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ReclassificationOfFinalPaymentObligationRelatedToManufacturingAgreementRecognizedInPriorPeriod" name="ReclassificationOfFinalPaymentObligationRelatedToManufacturingAgreementRecognizedInPriorPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_AmountPaidToLenders" name="AmountPaidToLenders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PaymentForUnderwritingFeesAndCommissions" name="PaymentForUnderwritingFeesAndCommissions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_MaximumRequiredFuturePaymentUponAchievementOfCertainDevelopmentAndMilestoneEventsNetSalesMetrics" name="MaximumRequiredFuturePaymentUponAchievementOfCertainDevelopmentAndMilestoneEventsNetSalesMetrics" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_DrCharlesJHomcyMember" name="DrCharlesJHomcyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ExcessOfPurchasePriceOverValueOfCommonStockShares" name="ExcessOfPurchasePriceOverValueOfCommonStockShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_EquityMethodInvestmentsAndOtherEquityInvestmentsPolicyTextBlock" name="EquityMethodInvestmentsAndOtherEquityInvestmentsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_RoyaltyInterestPurchaseAndSaleAgreementMember" name="RoyaltyInterestPurchaseAndSaleAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_RemainingBalanceInEscrowAccounts" name="RemainingBalanceInEscrowAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_SaleOfNonfinancialAssetsAbstract" name="SaleOfNonfinancialAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ResilienceAgreementsMember" name="ResilienceAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_IncreaseDecreaseInAccruedResearchAndDevelopmentLiabilities" name="IncreaseDecreaseInAccruedResearchAndDevelopmentLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_AtTheMarketOfferingMember" name="AtTheMarketOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DeferredRoyaltyObligationsTable" name="DeferredRoyaltyObligationsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_LicenseAndCollaborationAgreementAbstract" name="LicenseAndCollaborationAgreementAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_DebtInstrumentInterestOnlyExtensionDate" name="DebtInstrumentInterestOnlyExtensionDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_FoundationMedicineIncMember" name="FoundationMedicineIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PaymentForPrivateEquityFinancingWithExternalInvestors" name="PaymentForPrivateEquityFinancingWithExternalInvestors" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_TrancheTwoAdvanceMember" name="TrancheTwoAdvanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ContractualObligationInterestPortion" name="ContractualObligationInterestPortion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_MilestonePaymentReceivable" name="MilestonePaymentReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TransactionCostsIncurredInMergerTransactions" name="TransactionCostsIncurredInMergerTransactions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_NoncashLeaseExpense" name="NoncashLeaseExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems" name="PublicOfferingsShareRepurchaseProgramAndSecuritiesPurchaseAgreementLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_Rule10B51TradingPlanMember" name="Rule10B51TradingPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_OnePointSevenFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember" name="OnePointSevenFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PercentageOfCapitalizedPropertyAndEquipments" name="PercentageOfCapitalizedPropertyAndEquipments" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_ProceedsFromIssuanceOfNotesAfterDeductingDiscountAndOfferingExpenses" name="ProceedsFromIssuanceOfNotesAfterDeductingDiscountAndOfferingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_PaymentFollowingFDAApprovalOfTruseltiqMember" name="PaymentFollowingFDAApprovalOfTruseltiqMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_PaymentFromEscrowAccounts" name="PaymentFromEscrowAccounts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_LeidosBiomedicalResearchIncMember" name="LeidosBiomedicalResearchIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AlexionAgreementsMember" name="AlexionAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ServiceAgreementTerm" name="ServiceAgreementTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_PercentageOfCashReleasedFromEscrowAccounts" name="PercentageOfCashReleasedFromEscrowAccounts" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DevelopmentAndManufacturingServicesAgreementMember" name="DevelopmentAndManufacturingServicesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ScheduleOfPotentialMilestoneAmountsAndAccrualsTableTextBlock" name="ScheduleOfPotentialMilestoneAmountsAndAccrualsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_LoanAgreementMember" name="LoanAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_InitialTransactionPriceForLicenseAndCollaborationAgreement" name="InitialTransactionPriceForLicenseAndCollaborationAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_SaleOfStockPremiumOverLastReportedSalePricePercentage" name="SaleOfStockPremiumOverLastReportedSalePricePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_NumberOfEmployeesForReplacementAwards" name="NumberOfEmployeesForReplacementAwards" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="bbio_LianBioMember" name="LianBioMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_AccruedTerminationCharges" name="AccruedTerminationCharges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TransitionServiceAggrementMember" name="TransitionServiceAggrementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BridgeBioGeneTherapyLLCMember" name="BridgeBioGeneTherapyLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_ShareRepurchaseTransactionsMember" name="ShareRepurchaseTransactionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_LoanSecurityAgreementMember" name="LoanSecurityAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="bbio_BusinessCombinationPotentialCashConsideration" name="BusinessCombinationPotentialCashConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="bbio_CashCashEquivalentsAndRestrictedCashMaturityPeriod" name="CashCashEquivalentsAndRestrictedCashMaturityPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="bbio_DebtInstrumentCumulativeAccruedInterestConvertibleIntoPrincipal" name="DebtInstrumentCumulativeAccruedInterestConvertibleIntoPrincipal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="bbio_TwoThousandAndTwentyFiveNoteMember" name="TwoThousandAndTwentyFiveNoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
