United States · health-workforce · register
Every healthcare provider and organisation issued a National Provider Identifier, published as a monthly full-file download and a weekly incremental.
Requested. Carries the publisher's own warning that an NPI does not evidence licensure — a caveat the catalog must repeat, because the obvious use of this file is exactly the check it does not support.
CSV · request JSON · request API · request
We build datasets in the order people request them. A request is a vote, and the count is public.
| Publisher | Centers for Medicare & Medicaid Services (CMS) |
|---|---|
| Publication mandate | HIPAA administrative simplification — NPI enumeration |
| Licence | US Government work — public domain not verified |
| Access method | csv |
| Fragmentation | single national file |
| Update frequency | monthly full file, weekly incremental |
| Free structured version | yes — https://download.cms.gov/nppes/NPI_Files.html |
| Who else serves this | none identified (listed as caution, not endorsement — an existing free or commercial service is often the most useful thing on this page) |
| mandated publication | pass |
|---|---|
| terms permissive or silent | pass |
| no login paywall captcha personal data | fail |
| no specialist legal advice needed | pass |
| verdict | needs_review |
Named individual practitioners with practice addresses.
Last checked 2026-08-25.