Live from the CMS NPI Registry
California NPI lookup by specialty
Choose a specialty to see providers with a practice address in California, with their NPI numbers. Each provider has a full NPI record and an exclusion check.
Specialties in California
Checking a California provider before you hire or bill
people and businesses with a California address are on OIG’s list of excluded individuals and entities (October 2026 file): 9,435 individuals and 291 businesses, 171 added in the last 12 months. That ranks California 1 of 56 states and territories.
Most often listed as: Nurse/Nurses Aide (3,088), Chiropractic (624), No Known Affiliation (412), Health Care Aide (405), Owner/Operator (391).
Most common reason: license revocation, suspension or surrender (4,257).
Department of Health Care Services (DHCS) publishes the Medi-Cal Suspended and Ineligible Provider List (csv, monthly). Our free exclusion check searches it automatically, together with OIG and SAM.gov.
All 50 state lists- Confirm the NPI in the CMS registry: NPI lookup (the provider pages below link here too).
- Screen the name against OIG, SAM.gov and the California Medicaid list: exclusion check, or your whole staff list at once.
- Check California’s own Medicaid list: Medi-Cal Suspended and Ineligible Provider List.
- Verify the license with the California board for that profession. NPI records don’t prove a license.