Medicare Part D prescriber lookup
The closest thing to a free prescription claims database. Enter one NPI and see that prescriber's Medicare Part D volume — total claims, beneficiaries, drug cost, brand versus generic split, and the drug-by-drug mix as published by CMS.
Don't have the NPI? Find it in the free NPI lookup.
What you get
One prescriber per lookup: their Part D totals and their published drug rows, with the CMS suppression and coverage caveats stated on screen. Filter by generic name to confirm whether a specific molecule shows up in their prescribing.
How the Part D prescriber lookup works
Everything comes from the CMS Medicare Part D Prescriber public use files — no estimates, no modelled volume.
- 1
Enter the prescriber's 10-digit NPI
Paste the NPI into the search box. If you only have a name or a city, find the number first in the free NPI lookup, which searches the CMS NPPES registry.
- 2
Read the Part D totals
The tool pulls that prescriber's row from the CMS Part D Prescriber public use files and shows total claims, beneficiaries, total drug cost, brand versus generic share, opioid and antibiotic claims and beneficiary risk.
- 3
Filter the drug mix by molecule
Add a generic drug name to narrow the drug table to one molecule, and compare claims, 30-day fills, beneficiaries and cost per claim against the prescriber's overall volume.
Questions about Part D prescriber data
- Is there a free prescription claims database?
- Yes, for Medicare Part D. CMS publishes the Part D Prescriber public use files, which report every prescriber's claims, beneficiary counts and drug costs by drug. This tool reads those files directly for a single NPI. Commercial and cash-pay prescription claims are not public.
- What does Medicare Part D data cover?
- Prescriptions dispensed to Medicare Part D enrollees and paid through the Part D benefit. It excludes commercial insurance, Medicaid, Veterans Affairs and cash-pay dispensing, so it is a floor on a prescriber's real volume rather than the complete picture.
- Why is a drug missing from a prescriber's list?
- CMS suppresses any drug row with 10 or fewer claims to protect patient privacy. That is why the drug rows shown will not add up to the prescriber's total claim count. Prescribers with 10 or fewer total Part D claims do not appear at all.
- How current is the Part D prescriber data?
- CMS releases the file annually, roughly two years behind the prescribing year. It shows established prescribing patterns, not this month's activity.
- How do I find a prescriber's NPI?
- Use the free NPI lookup, which searches the CMS NPPES registry by name, city, state or specialty and returns the 10-digit NPI. Paste that NPI here to see the prescriber's Part D drug mix.
- Is this lookup free?
- Yes, with a daily limit on how many prescribers one visitor can look up. Full market analysis — every prescriber in a county ranked into a call list — is the paid product.
Need every prescriber in a market, ranked?
One NPI at a time answers "is this prescriber worth a visit". RepVector answers "who are the 40 prescribers in this county worth a visit, in what order, and why" — Part D prescribing joined to NPPES contacts, Medicaid utilisation, facility data and access gaps, in one ranked call list.
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Ask in plain language. RepVector finds the universe, enriches each target from its own website, scores it 0–100, and hands you a ranked call list with phones, addresses and named contacts.
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