NAICS 621111
Physician Practices in California
Offices of physicians, except mental health specialists, primarily engaged in the independent practice of general or specialized medicine.
- Establishments (2023)
- 29,615
- Statewide, California
- Employees
- 231,960
- Mid-March employment
- Annual payroll
- $26B
- All establishments
- Avg. establishment size
- 7.8
- Employees per establishment
What acquirers look at
California’s corporate practice of medicine doctrine restricts lay ownership, so deals are structured as MSO arrangements. Not a first acquisition for an unlicensed buyer.
Medical Practice by county
Ranked by establishment count, 2023 County Business Patterns. For the crowded-versus-underserved reading, see the saturation ranking, which ranks by establishments per resident instead.
| # | County | Establishments | Per 10k residents | Share of state |
|---|---|---|---|---|
| 1 | Los Angeles County | 9,829 | 10.1 | 33.2% |
| 2 | Orange County | 3,946 | 12.5 | 13.3% |
| 3 | San Diego County | 2,576 | 7.8 | 8.7% |
| 4 | Riverside County | 1,448 | 5.7 | 4.9% |
| 5 | San Bernardino County | 1,202 | 5.4 | 4.1% |
| 6 | Santa Clara County | 1,139 | 5.9 | 3.8% |
| 7 | Ventura County | 903 | 10.9 | 3.0% |
| 8 | Alameda County | 789 | 4.8 | 2.7% |
| 9 | Sacramento County | 675 | 4.2 | 2.3% |
| 10 | Fresno County | 665 | 6.4 | 2.2% |
| 11 | Contra Costa County | 632 | 5.4 | 2.1% |
| 12 | San Francisco County | 621 | 7.5 | 2.1% |
| 13 | Kern County | 494 | 5.3 | 1.7% |
| 14 | San Mateo County | 405 | 5.4 | 1.4% |
| 15 | Santa Barbara County | 395 | 8.9 | 1.3% |
| 16 | San Luis Obispo County | 323 | 11.4 | 1.1% |
| 17 | San Joaquin County | 318 | 3.9 | 1.1% |
| 18 | Tulare County | 292 | 6.0 | 1.0% |
| 19 | Placer County | 277 | 6.3 | 0.9% |
| 20 | Stanislaus County | 276 | 4.9 | 0.9% |
| 21 | Monterey County | 256 | 5.9 | 0.9% |
| 22 | Marin County | 255 | 10.1 | 0.9% |
| 23 | Sonoma County | 245 | 5.0 | 0.8% |
| 24 | Santa Cruz County | 177 | 6.8 | 0.6% |
| 25 | Solano County | 143 | 3.1 | 0.5% |
Counties in California
Medical Practice in Los AngelesMedical Practice in San DiegoMedical Practice in OrangeMedical Practice in RiversideMedical Practice in San BernardinoMedical Practice in Santa ClaraMedical Practice in AlamedaMedical Practice in SacramentoMedical Practice in Contra CostaMedical Practice in FresnoMedical Practice in KernMedical Practice in VenturaMedical Practice in San FranciscoMedical Practice in San JoaquinMedical Practice in San MateoMedical Practice in StanislausMedical Practice in SonomaMedical Practice in TulareMedical Practice in SolanoMedical Practice in PlacerMedical Practice in Santa BarbaraMedical Practice in MontereyMedical Practice in MercedMedical Practice in San Luis ObispoMedical Practice in Santa CruzMedical Practice in MarinMedical Practice in YoloMedical Practice in ButteMedical Practice in El DoradoMedical Practice in ShastaMedical Practice in ImperialMedical Practice in MaderaMedical Practice in KingsMedical Practice in NapaMedical Practice in HumboldtMedical Practice in NevadaMedical Practice in SutterMedical Practice in YubaMedical Practice in MendocinoMedical Practice in San BenitoMedical Practice in LakeMedical Practice in TehamaMedical Practice in TuolumneMedical Practice in CalaverasMedical Practice in SiskiyouMedical Practice in AmadorMedical Practice in GlennMedical Practice in LassenMedical Practice in Del NorteMedical Practice in ColusaPlumasMedical Practice in InyoMedical Practice in MariposaMedical Practice in TrinityMedical Practice in MonoModocSierraAlpine
Sources
- U.S. Census Bureau, 2023 County Business Patterns. Establishment counts, employment and annual payroll by NAICS. Retrieved 2026-09-08.
- U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages (2026Q1). Quarterly establishment counts and employment for employers covered by unemployment insurance. Retrieved 2026-09-08.