NPI Tools
Free, interactive tools built on the same public NPPES data that powers our provider search.
NPI Validator
Paste any 10-digit number to confirm its NPI check digit (Luhn) is correct. Runs entirely in your browser — nothing is sent anywhere.
Provider Lookup
Search 9.6M+ providers by name, NPI, specialty, or location, with facets for entity type, credential, and more.
Want the background?
The NPI guides explain what an NPI is, entity types, and taxonomy codes.