NPI Lookup · California

California NPI lookup

1,166,355 active providers and organizations hold NPIs registered in California: 971,235 individual clinicians and 195,120 organizations, across 2,255 cities. Search them by name, free, no signup.

1,166,355
Active NPIs in California
971,235
Individual clinicians
195,120
Organizations
2,255
Cities with a registered provider
Where they are

Where California's providers are registered

Registry counts by practice city and primary specialty. The count is the finding: it's the size of the ground a rep covers here.

Most NPIs by city

Los Angeles82,241
San Diego59,669
San Francisco42,370
Sacramento37,027
San Jose24,517
Fresno22,536
Oakland20,548
Monrovia17,138
Long Beach16,208
Riverside16,043

Most common specialties

Behavior Technician171,491
Marriage & Family Therapist55,495
Student in an Organized Health Care Education/Training Program49,643
Mental Health Counselor37,772
Pharmacist32,912
Clinical Social Worker31,495
Addiction (Substance Use Disorder) Counselor29,803
Case Manager/Care Coordinator27,294
Physical Therapist24,907
Internal Medicine Physician24,700
Where this data comes from. Provider identity, specialty, and practice location come from CMS's public NPPES registry (the National Plan & Provider Enumeration System), the official record of every NPI ever issued. Deactivated NPIs are excluded. Addresses are what the provider filed and can lag a move. Where a profile shows Medicare context, it comes from CMS's public utilization, Part D, and Open Payments files: traditional Medicare fee-for-service only, and CMS suppresses any provider-and-code line under 11 beneficiaries before publishing. An Open Payments record is a disclosed relationship, not evidence a clinician uses a product. Prospect 811 organizes public data; it doesn't add to or alter it. Not affiliated with or endorsed by CMS. Full detail on the data page.

Looking for another state? Back to the national NPI lookup.

A registry counts California's providers. A rep needs the right 5.

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