Centers for Medicare and Medicaid Services

NPPES NPI Registry API

The NPPES NPI Registry API provides free public access to look up active National Provider Identifier records for individual and organizational healthcare providers, supporting FHIR-compatible JSON responses used widely in credentialing, directory, and claims validation workflows.

Documentation GitHub

Documentation

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Documentation

https://npiregistry.cms.hhs.gov/api-page

Other Resources

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Website

https://npiregistry.cms.hhs.gov/

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Help

https://npiregistry.cms.hhs.gov/help-api/