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Segment Reporting and Disaggregation of Relevant Expense Captions | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Segment Reporting and Disaggregation of Relevant Expense Captions | Segment Reporting and Disaggregation of Relevant Expense Captions Neurocrine Biosciences operates as a single global business segment dedicated to the research and development, commercialization, and sale of pharmaceuticals primarily in the U.S. for the treatment of neurological, neuroendocrine, and neuropsychiatric disorders. There were no changes to the accounting policies of the segment as disclosed in the 2024 Form 10-K. The determination of a single business segment is consistent with the consolidated financial information regularly reviewed by the Chief Executive Officer as chief operating decision maker (CODM) in assessing segment performance and deciding how to allocate resources on a consolidated basis. The CODM assesses performance for the segment and decides how to allocate resources based on net income that also is reported on the consolidated statements of income and comprehensive income as consolidated net income. The CODM uses net income to monitor budget and forecast versus actual results in assessing segment performance and to evaluate income generated from segment assets in deciding how to allocate resources. The measure of segment assets is reported on the consolidated balance sheets as total consolidated assets. The following table presents information about reported segment revenues, segment profit, and significant segment expenses.
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2025 |  | 2024 |  | 2025 |  | 2024
Revenues: |  |  |  |  |  |  |
INGREZZA net product sales | $ | 686.6 |  |  | $ | 612.9 |  |  | $ | 1,856.2 |  |  | $ | 1,698.4 |
CRENESSITY net product sales | 98.1 |  |  | — |  |  | 165.8 |  |  | — |
Other revenues (1) | 10.2 |  |  | 9.2 |  |  | 33.0 |  |  | 29.2 |
Total revenues | 794.9 |  |  | 622.1 |  |  | 2,055.0 |  |  | 1,727.6 |
Less: |  |  |  |  |  |  |
Cost of revenues | 14.0 |  |  | 8.0 |  |  | 34.5 |  |  | 24.7 |
Research and development: |  |  |  |  |  |  |
External research and development | 141.8 |  |  | 82.9 |  |  | 370.3 |  |  | 250.4 |
Payroll and benefits | 74.6 |  |  | 55.4 |  |  | 221.8 |  |  | 167.9 |
Milestones | 1.0 |  |  | 38.8 |  |  | 61.5 |  |  | 71.4 |
Other research and development (2) | 32.6 |  |  | 17.9 |  |  | 103.9 |  |  | 55.8 |
Total research and development | 250.0 |  |  | 195.0 |  |  | 757.5 |  |  | 545.5 |
Acquired in-process research and development | 0.3 |  |  | 1.0 |  |  | 0.4 |  |  | 9.5 |
Selling, general, and administrative | 291.6 |  |  | 234.3 |  |  | 854.4 |  |  | 719.4 |
Unrealized (gain) loss on equity investments | (30.6) |  |  | 16.9 |  |  | 6.7 |  |  | 35.2 |
Charges associated with convertible senior notes | — |  |  | — |  |  | — |  |  | 138.4 |
Interest income and other, net | (22.2) |  |  | (23.4) |  |  | (64.5) |  |  | (68.5) |
Provision for income taxes | 82.3 |  |  | 60.5 |  |  | 141.1 |  |  | 85.2 |
Net income | $ | 209.5 |  |  | $ | 129.8 |  |  | $ | 324.9 |  |  | $ | 238.2 |
_________________________ (1) Other revenues primarily consist of net product sales for ALKINDI and EFMODY and royalties earned on AbbVie net sales of elagolix and MTPC net sales of valbenazine. (2) Other research and development consists of indirect costs incurred for the benefit of multiple research and development programs, including facility-based expenses (such as rent expense) and other overhead allocations.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-21 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name 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