API reference
Provider search API
Find providers when you have a name or location but not yet an NPI. Directory search uses the same Bearer key, quotas, and response conventions as single-NPI lookup.
No credit card on free tierOpenAPI specPostman collectionUS NPI Registry (NPPES) source dataNPI-1 and NPI-2
Endpoint
GET /api/v1/providers/search — requires last_name and/or organization_name. Optional filters include city, state, taxonomy code, and limit.
Typical flow
- User types in a directory or enrollment UI.
- Your backend calls provider search and shows candidates.
- User selects a row; you confirm with GET /api/v1/npi/{npi}.
Full parameter tables and metering notes live on the docs quickstart.