Part D Prescribers
This tool (best for computer screen) lets you search Medicare Part D prescriber-by-drug data by NPI, prescriber name, brand name, and generic name. Because this table contains millions of records, broad searches may take longer to load. The data covers calendar year 2023 and is based on final-action Part D claims for the entire Medicare Part D population. Desktop view shows more data columns than smartphone view.
Last updated: March 18, 2026.
Key Facts
- Data source: CMS Medicare Part D Prescribers by Provider and Drug.
- The data covers calendar year 2023 and is based on final-action Part D claims for the entire Medicare Part D population.
- Search filters: state, NPI, prescriber name, brand name, and generic name.
- For faster results, search by NPI and/or prescriber name.
- Sortable numeric columns include Total Claims, Total Benes, and Total Costs.
See methods and field definitions below.
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Note: searches using drug name only (brand or generic) can take longer to load. For faster results, pair drug name with state, NPI, or prescriber name.
Explore Top 100 pages: #1 prescriber by state and DC for each drug.
Methods and Field Definitions
Data source: U.S. Centers for Medicare & Medicaid Services (CMS).
- Total Claims: Number of Part D claims attributed to the prescriber and drug in the record.
- Total Benes: Number of Part D beneficiaries associated with the prescriber and drug in the record.
- Total Day Supply: Aggregate day supply reported in the record.
- Total Costs: Aggregate drug cost reported in the record.