<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<xsd:schema attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.hcpi.com/20180630" xmlns:hcp="http://www.hcpi.com/20180630" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import namespace="http://fasb.org/srt/2018-01-31" schemaLocation="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-gaap/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-roles/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-roles-2018-01-31.xsd" />
  <xsd:import namespace="http://fasb.org/us-types/2018-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2018/elts/us-types-2018-01-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/currency/2017-01-31" schemaLocation="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/dei/2018-01-31" schemaLocation="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/exch/2018-01-31" schemaLocation="https://xbrl.sec.gov/exch/2018/exch-2018-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/invest/2013-01-31" schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/naics/2017-01-31" schemaLocation="http://xbrl.sec.gov/naics/2017/naics-2017-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/sic/2011-01-31" schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" />
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2018-01-31" schemaLocation="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hcp-20180630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hcp-20180630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hcp-20180630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hcp-20180630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:roleType id="Business" roleURI="http://www.hcpi.com/role/Business">
        <link:definition>2101100 - Disclosure - Business</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsAndContingencies" roleURI="http://www.hcpi.com/role/CommitmentsAndContingencies">
        <link:definition>2112100 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationOfCreditRisk" roleURI="http://www.hcpi.com/role/ConcentrationOfCreditRisk">
        <link:definition>2118100 - Disclosure - Concentration of Credit Risk</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationOfCreditRiskNarrativeDetails" roleURI="http://www.hcpi.com/role/ConcentrationOfCreditRiskNarrativeDetails">
        <link:definition>2418403 - Disclosure - Concentration of Credit Risk - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationOfCreditRiskScheduleOfConcentrationRiskDetails" roleURI="http://www.hcpi.com/role/ConcentrationOfCreditRiskScheduleOfConcentrationRiskDetails">
        <link:definition>2418402 - Disclosure - Concentration of Credit Risk - Schedule of Concentration Risk (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConcentrationOfCreditRiskTables" roleURI="http://www.hcpi.com/role/ConcentrationOfCreditRiskTables">
        <link:definition>2318301 - Disclosure - Concentration of Credit Risk (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.hcpi.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001000 - Statement - CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.hcpi.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfCashFlows" roleURI="http://www.hcpi.com/role/ConsolidatedStatementsOfCashFlows">
        <link:definition>1005000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfComprehensiveIncomeLoss" roleURI="http://www.hcpi.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss">
        <link:definition>1003000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfEquity" roleURI="http://www.hcpi.com/role/ConsolidatedStatementsOfEquity">
        <link:definition>1004000 - Statement - CONSOLIDATED STATEMENTS OF EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfEquityParenthetical" roleURI="http://www.hcpi.com/role/ConsolidatedStatementsOfEquityParenthetical">
        <link:definition>1004501 - Statement - CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsOfOperations" roleURI="http://www.hcpi.com/role/ConsolidatedStatementsOfOperations">
        <link:definition>1002000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.hcpi.com/role/Debt">
        <link:definition>2111100 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtBankLineOfCreditAndTermLoanDetails" roleURI="http://www.hcpi.com/role/DebtBankLineOfCreditAndTermLoanDetails">
        <link:definition>2411402 - Disclosure - Debt - Bank Line of Credit and Term Loan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtMortgageDebtDetails" roleURI="http://www.hcpi.com/role/DebtMortgageDebtDetails">
        <link:definition>2411404 - Disclosure - Debt - Mortgage Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSeniorUnsecuredNotesDetails" roleURI="http://www.hcpi.com/role/DebtSeniorUnsecuredNotesDetails">
        <link:definition>2411403 - Disclosure - Debt - Senior Unsecured Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.hcpi.com/role/DebtTables">
        <link:definition>2311301 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstruments" roleURI="http://www.hcpi.com/role/DerivativeFinancialInstruments">
        <link:definition>2120100 - Disclosure - Derivative Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsNarrativeDetails" roleURI="http://www.hcpi.com/role/DerivativeFinancialInstrumentsNarrativeDetails">
        <link:definition>2420403 - Disclosure - Derivative Financial Instruments - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsScheduleOfDerivativeInstrumentsDetails" roleURI="http://www.hcpi.com/role/DerivativeFinancialInstrumentsScheduleOfDerivativeInstrumentsDetails">
        <link:definition>2420402 - Disclosure - Derivative Financial Instruments - Schedule of Derivative Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsTables" roleURI="http://www.hcpi.com/role/DerivativeFinancialInstrumentsTables">
        <link:definition>2320301 - Disclosure - Derivative Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DocumentAndEntityInformation" roleURI="http://www.hcpi.com/role/DocumentAndEntityInformation">
        <link:definition>0001000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerCommonShare" roleURI="http://www.hcpi.com/role/EarningsPerCommonShare">
        <link:definition>2115100 - Disclosure - Earnings Per Common Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerCommonShareDetails" roleURI="http://www.hcpi.com/role/EarningsPerCommonShareDetails">
        <link:definition>2415402 - Disclosure - Earnings Per Common Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerCommonShareTables" roleURI="http://www.hcpi.com/role/EarningsPerCommonShareTables">
        <link:definition>2315301 - Disclosure - Earnings Per Common Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Equity" roleURI="http://www.hcpi.com/role/Equity">
        <link:definition>2113100 - Disclosure - Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityDetails" roleURI="http://www.hcpi.com/role/EquityDetails">
        <link:definition>2413402 - Disclosure - Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityTables" roleURI="http://www.hcpi.com/role/EquityTables">
        <link:definition>2313301 - Disclosure - Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.hcpi.com/role/FairValueMeasurements">
        <link:definition>2119100 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsSummaryOfCarryingAmountsAndFairValuesOfFinancialInstrumentsDetails" roleURI="http://www.hcpi.com/role/FairValueMeasurementsSummaryOfCarryingAmountsAndFairValuesOfFinancialInstrumentsDetails">
        <link:definition>2419402 - Disclosure - Fair Value Measurements - Summary of the Carrying Amounts and Fair Values of the Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.hcpi.com/role/FairValueMeasurementsTables">
        <link:definition>2319301 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Intangibles" roleURI="http://www.hcpi.com/role/Intangibles">
        <link:definition>2109100 - Disclosure - Intangibles</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangiblesIntangiblesLeaseAssetsDetails" roleURI="http://www.hcpi.com/role/IntangiblesIntangiblesLeaseAssetsDetails">
        <link:definition>2409402 - Disclosure - Intangibles - Intangibles Lease Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangiblesIntangiblesLeaseLiabilitiesDetails" roleURI="http://www.hcpi.com/role/IntangiblesIntangiblesLeaseLiabilitiesDetails">
        <link:definition>2409403 - Disclosure - Intangibles - Intangibles Lease Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangiblesTables" roleURI="http://www.hcpi.com/role/IntangiblesTables">
        <link:definition>2309301 - Disclosure - Intangibles (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsInAndAdvancesToUnconsolidatedJointVentures" roleURI="http://www.hcpi.com/role/InvestmentsInAndAdvancesToUnconsolidatedJointVentures">
        <link:definition>2108100 - Disclosure - Investments in and Advances to Unconsolidated Joint Ventures</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsInAndAdvancesToUnconsolidatedJointVenturesScheduleOfEquityMethodInvestmentsDetails" roleURI="http://www.hcpi.com/role/InvestmentsInAndAdvancesToUnconsolidatedJointVenturesScheduleOfEquityMethodInvestmentsDetails">
        <link:definition>2408402 - Disclosure - Investments in and Advances to Unconsolidated Joint Ventures - Schedule of Equity Method Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentsInAndAdvancesToUnconsolidatedJointVenturesTables" roleURI="http://www.hcpi.com/role/InvestmentsInAndAdvancesToUnconsolidatedJointVenturesTables">
        <link:definition>2308301 - Disclosure - Investments in and Advances to Unconsolidated Joint Ventures (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LoansReceivable" roleURI="http://www.hcpi.com/role/LoansReceivable">
        <link:definition>2107100 - Disclosure - Loans Receivable</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LoansReceivableNarrativeDetails" roleURI="http://www.hcpi.com/role/LoansReceivableNarrativeDetails">
        <link:definition>2407404 - Disclosure - Loans Receivable - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LoansReceivableScheduleOfLoansReceivableDetails" roleURI="http://www.hcpi.com/role/LoansReceivableScheduleOfLoansReceivableDetails">
        <link:definition>2407402 - Disclosure - Loans Receivable - Schedule of Loans Receivable (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LoansReceivableScheduleOfLoansReceivableInternalRatingsDetails" roleURI="http://www.hcpi.com/role/LoansReceivableScheduleOfLoansReceivableInternalRatingsDetails">
        <link:definition>2407403 - Disclosure - Loans Receivable - Schedule of Loans Receivable Internal Ratings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LoansReceivableTables" roleURI="http://www.hcpi.com/role/LoansReceivableTables">
        <link:definition>2307301 - Disclosure - Loans Receivable (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="MasterTransactionsAndCooperationAgreementWithBrookdale" roleURI="http://www.hcpi.com/role/MasterTransactionsAndCooperationAgreementWithBrookdale">
        <link:definition>2103100 - Disclosure - Master Transactions and Cooperation Agreement with Brookdale</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="MasterTransactionsAndCooperationAgreementWithBrookdaleDetails" roleURI="http://www.hcpi.com/role/MasterTransactionsAndCooperationAgreementWithBrookdaleDetails">
        <link:definition>2403401 - Disclosure - Master Transactions and Cooperation Agreement with Brookdale (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetInvestmentInDirectFinancingLeases" roleURI="http://www.hcpi.com/role/NetInvestmentInDirectFinancingLeases">
        <link:definition>2106100 - Disclosure - Net Investment in Direct Financing Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetInvestmentInDirectFinancingLeasesDirectFinancingLeaseInternalRatingsDetails" roleURI="http://www.hcpi.com/role/NetInvestmentInDirectFinancingLeasesDirectFinancingLeaseInternalRatingsDetails">
        <link:definition>2406403 - Disclosure - Net Investment in Direct Financing Leases - Direct Financing Lease Internal Ratings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetInvestmentInDirectFinancingLeasesDirectFinancingLeasesDetails" roleURI="http://www.hcpi.com/role/NetInvestmentInDirectFinancingLeasesDirectFinancingLeasesDetails">
        <link:definition>2406402 - Disclosure - Net Investment in Direct Financing Leases - Direct Financing Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NetInvestmentInDirectFinancingLeasesTables" roleURI="http://www.hcpi.com/role/NetInvestmentInDirectFinancingLeasesTables">
        <link:definition>2306301 - Disclosure - Net Investment in Direct Financing Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactions" roleURI="http://www.hcpi.com/role/RealEstateTransactions">
        <link:definition>2105100 - Disclosure - Real Estate Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsDispositionOfRealEstateDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsDispositionOfRealEstateDetails">
        <link:definition>2405405 - Disclosure - Real Estate Transactions - Disposition of Real Estate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsHeldForSaleDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsHeldForSaleDetails">
        <link:definition>2405402 - Disclosure - Real Estate Transactions - Held for Sale (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsImpairmentsOfRealEstateDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsImpairmentsOfRealEstateDetails">
        <link:definition>2405408 - Disclosure - Real Estate Transactions - Impairments of Real Estate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsInvestmentsInRealEstateDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsInvestmentsInRealEstateDetails">
        <link:definition>2405407 - Disclosure - Real Estate Transactions - Investments in Real Estate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsMobJvDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsMobJvDetails">
        <link:definition>2405406 - Disclosure - Real Estate Transactions - MOB JV (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsRideaIiSaleTransactionDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsRideaIiSaleTransactionDetails">
        <link:definition>2405403 - Disclosure - Real Estate Transactions - RIDEA II Sale Transaction (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsTables" roleURI="http://www.hcpi.com/role/RealEstateTransactionsTables">
        <link:definition>2305301 - Disclosure - Real Estate Transactions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateTransactionsUKPortfolioDetails" roleURI="http://www.hcpi.com/role/RealEstateTransactionsUKPortfolioDetails">
        <link:definition>2405404 - Disclosure - Real Estate Transactions - U.K. Portfolio (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentDisclosures" roleURI="http://www.hcpi.com/role/SegmentDisclosures">
        <link:definition>2114100 - Disclosure - Segment Disclosures</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentDisclosuresRevenuesAndAssetsBySegmentDetails" roleURI="http://www.hcpi.com/role/SegmentDisclosuresRevenuesAndAssetsBySegmentDetails">
        <link:definition>2414403 - Disclosure - Segment Disclosures - Revenues and Assets by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentDisclosuresSummaryInformationForReportableSegmentsDetails" roleURI="http://www.hcpi.com/role/SegmentDisclosuresSummaryInformationForReportableSegmentsDetails">
        <link:definition>2414402 - Disclosure - Segment Disclosures - Summary Information for the Reportable Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentDisclosuresTables" roleURI="http://www.hcpi.com/role/SegmentDisclosuresTables">
        <link:definition>2314301 - Disclosure - Segment Disclosures (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPolicies" roleURI="http://www.hcpi.com/role/SummaryOfSignificantAccountingPolicies">
        <link:definition>2102100 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesNarrativeDetails" roleURI="http://www.hcpi.com/role/SummaryOfSignificantAccountingPoliciesNarrativeDetails">
        <link:definition>2402403 - Disclosure - Summary of Significant Accounting Policies - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesPolicies" roleURI="http://www.hcpi.com/role/SummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>2202201 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesScheduleOfCashFlowsImpactFromAsusAdoptionDetails" roleURI="http://www.hcpi.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfCashFlowsImpactFromAsusAdoptionDetails">
        <link:definition>2402405 - Disclosure - Summary of Significant Accounting Policies - Schedule of Cash Flows Impact from ASUs Adoption (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryOfSignificantAccountingPoliciesTables" roleURI="http://www.hcpi.com/role/SummaryOfSignificantAccountingPoliciesTables">
        <link:definition>2302302 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalCashFlowInformation" roleURI="http://www.hcpi.com/role/SupplementalCashFlowInformation">
        <link:definition>2116100 - Disclosure - Supplemental Cash Flow Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalCashFlowInformationDetails" roleURI="http://www.hcpi.com/role/SupplementalCashFlowInformationDetails">
        <link:definition>2416402 - Disclosure - Supplemental Cash Flow Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalCashFlowInformationScheduleOfCashCashEquivalentsAndRestrictedCashDetails" roleURI="http://www.hcpi.com/role/SupplementalCashFlowInformationScheduleOfCashCashEquivalentsAndRestrictedCashDetails">
        <link:definition>2416403 - Disclosure - Supplemental Cash Flow Information - Schedule of Cash, Cash Equivalents and Restricted Cash (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalCashFlowInformationTables" roleURI="http://www.hcpi.com/role/SupplementalCashFlowInformationTables">
        <link:definition>2316301 - Disclosure - Supplemental Cash Flow Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="VariableInterestEntities" roleURI="http://www.hcpi.com/role/VariableInterestEntities">
        <link:definition>2117100 - Disclosure - Variable Interest Entities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="VariableInterestEntitiesConsolidatedAssetsAndLiabilitiesOfViesDetails" roleURI="http://www.hcpi.com/role/VariableInterestEntitiesConsolidatedAssetsAndLiabilitiesOfViesDetails">
        <link:definition>2417404 - Disclosure - Variable Interest Entities - Consolidated Assets and Liabilities of VIEs (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="VariableInterestEntitiesNarrativeDetails" roleURI="http://www.hcpi.com/role/VariableInterestEntitiesNarrativeDetails">
        <link:definition>2417402 - Disclosure - Variable Interest Entities - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="VariableInterestEntitiesScheduleOfVariableInterestEntitiesDetails" roleURI="http://www.hcpi.com/role/VariableInterestEntitiesScheduleOfVariableInterestEntitiesDetails">
        <link:definition>2417403 - Disclosure - Variable Interest Entities - Schedule of Variable Interest Entities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="VariableInterestEntitiesTables" roleURI="http://www.hcpi.com/role/VariableInterestEntitiesTables">
        <link:definition>2317301 - Disclosure - Variable Interest Entities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="hcp_AdjustedNetOperatingIncomeFromContinuingOperations" name="AdjustedNetOperatingIncomeFromContinuingOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_AdvancesToUnconsolidatedJointVenturesNetMember" name="AdvancesToUnconsolidatedJointVenturesNetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_AncillaryServiceRevenueMember" name="AncillaryServiceRevenueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_BritanniaBiotechGatewayLPMember" name="BritanniaBiotechGatewayLPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_BrookdaleMember" name="BrookdaleMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_BusinessCombinationConsiderationCashPaidAndDebtSettled" name="BusinessCombinationConsiderationCashPaidAndDebtSettled" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_CcrcJvInvestmentMember" name="CcrcJvInvestmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ContributionOfPropertyNumberOfProperties" name="ContributionOfPropertyNumberOfProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_CreditFacilityAnd2015TermLoanMember" name="CreditFacilityAnd2015TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_DFLPortfolioMember" name="DFLPortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DebtInstrumentCollateralHealthcareFacilitiesCarryingValue" name="DebtInstrumentCollateralHealthcareFacilitiesCarryingValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCollateralHealthcareFacilitiesNumber" name="DebtInstrumentCollateralHealthcareFacilitiesNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCovenantDebtToAssets" name="DebtInstrumentCovenantDebtToAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCovenantFixedChargeRatioMinimum" name="DebtInstrumentCovenantFixedChargeRatioMinimum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCovenantNetWorth" name="DebtInstrumentCovenantNetWorth" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCovenantSecuredDebtToAssets" name="DebtInstrumentCovenantSecuredDebtToAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentCovenantUnsecuredDebtToUnencumberedAssets" name="DebtInstrumentCovenantUnsecuredDebtToUnencumberedAssets" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentNumberofExtensions" name="DebtInstrumentNumberofExtensions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentPeriodOfExtension" name="DebtInstrumentPeriodOfExtension" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DebtInstrumentPortionDenominatedInForeignCurrency" name="DebtInstrumentPortionDenominatedInForeignCurrency" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentProvided" name="DebtInstrumentProvided" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentProvidedByEntity" name="DebtInstrumentProvidedByEntity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_DebtInstrumentProvidedByThirdParty" name="DebtInstrumentProvidedByThirdParty" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_DebtInstrumentRedemptionPeriodThereafterMember" name="DebtInstrumentRedemptionPeriodThereafterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DebtInstrumentWeightedAverageMaturity" name="DebtInstrumentWeightedAverageMaturity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_DevelopmentJVsMember" name="DevelopmentJVsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DiscontinuedOperationsOwnershipInterestDisposed" name="DiscontinuedOperationsOwnershipInterestDisposed" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DisposalGroupIncludingDiscontinuedOperationPercentageOfOwnershipInterest" name="DisposalGroupIncludingDiscontinuedOperationPercentageOfOwnershipInterest" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DispositionOfPropertiesSoldNumber" name="DispositionOfPropertiesSoldNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DistributionsInExcessOfEarningsFromUnconsolidatedJointVentures" name="DistributionsInExcessOfEarningsFromUnconsolidatedJointVentures" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_DocumentEntityInformationAbstract" name="DocumentEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_DownREITMember" name="DownREITMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_DownReitLimitedLiabilityCompanyNonmanagingMemberUnitsOutstanding" name="DownReitLimitedLiabilityCompanyNonmanagingMemberUnitsOutstanding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_DownreitPartnershipsMember" name="DownreitPartnershipsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_EquityAwardsMember" name="EquityAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_EquityMethodInvestmentsChangeInFairValue" name="EquityMethodInvestmentsChangeInFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="hcp_EstimateChangeInFairValueOfDerivativeForAssumptionOfOnePercentagePointChangeInInterestRate" name="EstimateChangeInFairValueOfDerivativeForAssumptionOfOnePercentagePointChangeInInterestRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="hcp_FiniteLivedIntangibleLiabilitiesAccumulatedAmortization" name="FiniteLivedIntangibleLiabilitiesAccumulatedAmortization" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_FiniteLivedIntangibleLiabilitiesGross" name="FiniteLivedIntangibleLiabilitiesGross" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element id="hcp_FiniteLivedIntangibleLiabilitiesNet" name="FiniteLivedIntangibleLiabilitiesNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_FourSeasonsHealthCareMember" name="FourSeasonsHealthCareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_GbpLiborMember" name="GbpLiborMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HCOneFacilityMember" name="HCOneFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HCPVenturesIIILLCMember" name="HCPVenturesIIILLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HCPVenturesIVLLCMember" name="HCPVenturesIVLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HaydenJVMember" name="HaydenJVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HcpCpaBrookdaleJvMember" name="HcpCpaBrookdaleJvMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_HcpVenturesVMember" name="HcpVenturesVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_IntangibleAssetsAndLiabilitiesDisclosureTextBlock" name="IntangibleAssetsAndLiabilitiesDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_IntangiblesDisclosureAbstract" name="IntangiblesDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_KYJVsMember" name="KYJVsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LASDKLPMember" name="LASDKLPMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_LeaseAmendmentsAndTerminationsAndJointVentureFormationsDisclosureTextBlock" name="LeaseAmendmentsAndTerminationsAndJointVentureFormationsDisclosureTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LeaseAmendmentsAndTerminationsAndJointVentureFormationsLineItems" name="LeaseAmendmentsAndTerminationsAndJointVentureFormationsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LeaseAmendmentsAndTerminationsAndJointVentureFormationsTable" name="LeaseAmendmentsAndTerminationsAndJointVentureFormationsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LifeScienceJVsMember" name="LifeScienceJVsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LifescienceAndSeniorHousingOperatingPortfolioMember" name="LifescienceAndSeniorHousingOperatingPortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LifescienceMember" name="LifescienceMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_LineOfCreditAndTermLoanMember" name="LineOfCreditAndTermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_LineOfCreditFacilityAdditionalAvailableBorrowingCapacityMaximum" name="LineOfCreditFacilityAdditionalAvailableBorrowingCapacityMaximum" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="hcp_LoanReceivableReduction" name="LoanReceivableReduction" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="hcp_LoansAndLeasesReceivableAsPercentage" name="LoansAndLeasesReceivableAsPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_LoansAndLeasesReceivablePurchaseOptionNumberOfProperties" name="LoansAndLeasesReceivablePurchaseOptionNumberOfProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_LoansAndLeasesReceivablePurchaseOptionNumberOfPropertiesAcquired" name="LoansAndLeasesReceivablePurchaseOptionNumberOfPropertiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_LoansReceivableGrossCarryingAmountMezzanine" name="LoansReceivableGrossCarryingAmountMezzanine" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_LoansReceivableGrossOther" name="LoansReceivableGrossOther" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_LoansandLeasesReceivableRemainingCommitments" name="LoansandLeasesReceivableRemainingCommitments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_MOBJVMember" name="MOBJVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementAgreementAgreementsWithTerminationRightsPeriod" name="ManagementAgreementAgreementsWithTerminationRightsPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementAgreementNumberOfRenewals" name="ManagementAgreementNumberOfRenewals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementAgreementNumberofAgreementsWithTerminationRights" name="ManagementAgreementNumberofAgreementsWithTerminationRights" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_ManagementAgreementRenewalTerm" name="ManagementAgreementRenewalTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementAgreementTerm" name="ManagementAgreementTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementAgreementTerminationPeriod" name="ManagementAgreementTerminationPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_ManagementAndAccountingServicesMember" name="ManagementAndAccountingServicesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ManagementFeePayableAsPercentageOfEbitdar" name="ManagementFeePayableAsPercentageOfEbitdar" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MariaMallabandCareGroupLoanMember" name="MariaMallabandCareGroupLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MariaMallabandCareGroupLtdBridgeLoanMember" name="MariaMallabandCareGroupLtdBridgeLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MariaMallabandCareGroupLtdMember" name="MariaMallabandCareGroupLtdMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MbkDevelopmentJvMember" name="MbkDevelopmentJvMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MbkJvMember" name="MbkJvMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MedicalOfficeJVsMember" name="MedicalOfficeJVsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_MedicalOfficeMember" name="MedicalOfficeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_NetInvestmentInDirectFinancingAndSalesTypeLeasesAsPercentage" name="NetInvestmentInDirectFinancingAndSalesTypeLeasesAsPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NetOperatingIncomeFromContinuingOperations" name="NetOperatingIncomeFromContinuingOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="hcp_NetRentableAreaLeasedPercentage" name="NetRentableAreaLeasedPercentage" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NonCashAcquisitionsAndDispositionsSettledWithReceivablesAndRestrictedCash" name="NonCashAcquisitionsAndDispositionsSettledWithReceivablesAndRestrictedCash" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="hcp_NonCashAdjustmentsToNetOperatingIncomeFromContinuingOperations" name="NonCashAdjustmentsToNetOperatingIncomeFromContinuingOperations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="hcp_NumberOfAssetsSoldOrTransited" name="NumberOfAssetsSoldOrTransited" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_NumberOfFacilities" name="NumberOfFacilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfFacilitiesTransitionedToDifferentSegment" name="NumberOfFacilitiesTransitionedToDifferentSegment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_NumberOfInstallmentsInDispositionOfProperties" name="NumberOfInstallmentsInDispositionOfProperties" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_NumberOfLoanToVieBorrowers" name="NumberOfLoanToVieBorrowers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfPropertiesAcquired" name="NumberOfPropertiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_NumberOfPropertiesPotentiallySoldOrTransitionedOut" name="NumberOfPropertiesPotentiallySoldOrTransitionedOut" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfPropertiesToBeSold" name="NumberOfPropertiesToBeSold" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfPropertiesUnderManagementAgreement" name="NumberOfPropertiesUnderManagementAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfUnconsolidatedJointVenture" name="NumberOfUnconsolidatedJointVenture" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberOfVieBorrowersWithMarketableDebtSecurities" name="NumberOfVieBorrowersWithMarketableDebtSecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_NumberofFacilitiesOwnedbyUnconsolidatedJointVenture" name="NumberofFacilitiesOwnedbyUnconsolidatedJointVenture" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_OperatingLeaseNumberOfPropertiesWithRentConcessions" name="OperatingLeaseNumberOfPropertiesWithRentConcessions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_OperatingLeasePropertiesPotentiallySoldOrTransitionedOutTerm" name="OperatingLeasePropertiesPotentiallySoldOrTransitionedOutTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_OperatingLeaseRentalConcessions" name="OperatingLeaseRentalConcessions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element id="hcp_OperatingLeasesLeaseSaleOrTransferAllowablePeriod" name="OperatingLeasesLeaseSaleOrTransferAllowablePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_OperatingManagementFeeAnnualPercentFeeIncrease" name="OperatingManagementFeeAnnualPercentFeeIncrease" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_OperatingManagementFeePercentFeeIncreasePeriod" name="OperatingManagementFeePercentFeeIncreasePeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_OtayRanchMember" name="OtayRanchMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_OtherLoansReceivableSecuredMember" name="OtherLoansReceivableSecuredMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_OtherNonReportingSegmentMember" name="OtherNonReportingSegmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_OwnershipInterestInProperties" name="OwnershipInterestInProperties" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasicAndDiluted" name="ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasicAndDiluted" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="hcp_PeriodOfCallOptionRetained" name="PeriodOfCallOptionRetained" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ProceedsFromSaleOfLeasedAssets" name="ProceedsFromSaleOfLeasedAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="hcp_PropertiesHeldForSaleNumber" name="PropertiesHeldForSaleNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_PropertiesLeasedNumber" name="PropertiesLeasedNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="hcp_PropertiesWithDirectFinancingLeasesNumber" name="PropertiesWithDirectFinancingLeasesNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_RIDEAFacilitiesInSeparateStructuresMember" name="RIDEAFacilitiesInSeparateStructuresMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_RIDEAFacilitiesMember" name="RIDEAFacilitiesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_RealEstatePropertiesClassifiedAsHeldForSaleDuringPeriod" name="RealEstatePropertiesClassifiedAsHeldForSaleDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedNonCashAdjustments" name="ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedNonCashAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_RentalRevenueMember" name="RentalRevenueMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_RentalRevenues" name="RentalRevenues" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_ResidentFeesMember" name="ResidentFeesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_RestrictedStockVested" name="RestrictedStockVested" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_Ridea2Member" name="Ridea2Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SalesRevenuesMember" name="SalesRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ScheduleOfFiniteLivedIntangibleLiabilitiesByMajorClassTableTextBlock" name="ScheduleOfFiniteLivedIntangibleLiabilitiesByMajorClassTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ScheduleOfNetInvestmentInDirectFinancingAndSalesTypeLeasesTableTextBlock" name="ScheduleOfNetInvestmentInDirectFinancingAndSalesTypeLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_ScheduleOfVariableInterestEntitiesIncludedInBalanceSheet" name="ScheduleOfVariableInterestEntitiesIncludedInBalanceSheet" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SeniorHousingOperatingPortfolioAndMedicalOfficeMember" name="SeniorHousingOperatingPortfolioAndMedicalOfficeMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SeniorHousingOperatingPortfolioMember" name="SeniorHousingOperatingPortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SeniorHousingTripleNetMember" name="SeniorHousingTripleNetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SeniorHousingTripleNetandSeniorHousingOperatingPortfolioMember" name="SeniorHousingTripleNetandSeniorHousingOperatingPortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_SuburbanPropertiesLLCMember" name="SuburbanPropertiesLLCMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_SummaryOfSeniorNotesIssuancesTableTextBlock" name="SummaryOfSeniorNotesIssuancesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_TandemHealthCareLoanMember" name="TandemHealthCareLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_TaxBenefitOfInitialConsolidationOfVariableInterestEntity" name="TaxBenefitOfInitialConsolidationOfVariableInterestEntity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_TenantReimbursementsMember" name="TenantReimbursementsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_TermLoan2015Member" name="TermLoan2015Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_TermLoan2018Member" name="TermLoan2018Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_TorreyPinesScienceCenterMember" name="TorreyPinesScienceCenterMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_TotalConsiderationForDispositionOfRealEstate" name="TotalConsiderationForDispositionOfRealEstate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_U.K.JVMember" name="U.K.JVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_U.K.PortfolioMember" name="U.K.PortfolioMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_UnsecuredNote5.375PercentDue2021Member" name="UnsecuredNote5.375PercentDue2021Member" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_UnsecuredNote5.375PercentMember" name="UnsecuredNote5.375PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_UnsecuredNote5.625PercentMember" name="UnsecuredNote5.625PercentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_VIETenantsNumber" name="VIETenantsNumber" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntitiesAbstract" name="VariableInterestEntitiesAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_VariableInterestEntitiesTextBlock" name="VariableInterestEntitiesTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="hcp_VariableInterestEntityControllingOwnershipInterestThroughPartnership" name="VariableInterestEntityControllingOwnershipInterestThroughPartnership" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntityNotPrimaryBeneficiaryDebtInvestmentMember" name="VariableInterestEntityNotPrimaryBeneficiaryDebtInvestmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntityNotPrimaryBeneficiaryInvestmentInJointVentureMember" name="VariableInterestEntityNotPrimaryBeneficiaryInvestmentInJointVentureMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntityNotPrimaryBeneficiarySellerFinancingMember" name="VariableInterestEntityNotPrimaryBeneficiarySellerFinancingMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntityNotPrimaryBeneficiaryTenantsWithDirectFinancingLeasesMember" name="VariableInterestEntityNotPrimaryBeneficiaryTenantsWithDirectFinancingLeasesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VariableInterestEntityNotPrimaryBeneficiaryTenantsWithOperatingLeasesMember" name="VariableInterestEntityNotPrimaryBeneficiaryTenantsWithOperatingLeasesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VintageIlDevelopmentMember" name="VintageIlDevelopmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_VintageParkJVMember" name="VintageParkJVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_WaldwickMember" name="WaldwickMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_WatchListFinancingReceivableMember" name="WatchListFinancingReceivableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_WatertownJVMember" name="WatertownJVMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="hcp_WorkoutFinancingReceivableMember" name="WorkoutFinancingReceivableMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
