Updated October 2026

Largest primary care groups in California

Medical group directory
California
Primary care

Groups: 3,969
Internal Medicine groups: 1,835
Family Medicine groups: 1,169
Internal medicine specialists: 22,438
Family physicians: 4,605

There are 3,969 primary care groups in California with a Medicare PAC ID: 1,835 internal medicine, 1,169 family medicine, 619 nurse practitioner, 207 physician assistant and 138 general practice. The Permanente Medical Group, Inc. is the largest internal medicine group, with 3,018 internal medicine specialists, and MemorialCare Medical Group the largest family medicine group, with 247 family physicians.

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The Permanente Medical Group, Inc. is the largest primary care group in California, with 11,708 physicians

Ranked by physicians with a California address linked to each group. Southern California Permanente Medical Group is second with 11,175, and UCSF Pediatrics third with 3,527. 119 California groups have 100 or more physicians.

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Primary care groups in California, ranked by physicians, 351 to 400
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
351	Canyon Springs Medical GroupMoreno Valley · 3 sites	-	21	25	Decision makers
352	CA Hospital Hospitalist Medical Group, Inc.Los Angeles · 1 site	-	21	24	Decision makers
353	Central California Hospital Medicine GroupFresno · 3 sites	-	21	23	Decision makers
354	Scenic Faculty Medical GroupModesto · 7 sites	-	21	23	Decision makers
355	Shasta Regional Medical GroupRedding · 11 sites	Parent on file	21	22	Decision makers
356	PIH Health PhysiciansColorado Springs · 5 sites	Parent on file	20	104	Decision makers
357	Circle MedicalSan Francisco · 16 sites	Parent on file	20	69	Decision makers
358	Opsam HealthSan Diego · 10 sites	Parent on file	20	62	Decision makers
359	Citrus Valley Medical AssociatesCorona · 7 sites	-	20	42	Decision makers
360	Arcadia Intensivist Group Inc.Arcadia · 7 sites	-	20	40	Decision makers
361	Central Valley Indian Health, Inc.Clovis · 7 sites	Parent on file	20	40	Decision makers
362	Pacific Cancer CareMonterey · 3 sites	-	20	32	Decision makers
363	SCCT Medical GroupValencia · 4 sites	Parent on file	20	30	Decision makers
364	Aligned GeriatricsSan Diego · 2 sites	-	20	27	Decision makers
365	Newport Critical Care PhysiciansNewport Beach · 3 sites	-	20	20	Decision makers
366	All Inclusive Medical Services, Inc.Carmichael · 7 sites	-	19	80	Decision makers
367	Heritage Victor Valley Medical GroupVictorville · 6 sites	Parent on file	19	53	Decision makers
368	SNF Specialists Medical CorporationFairfield · 4 sites	-	19	53	Decision makers
369	Clínica Monseñor Oscar A. RomeroLos Angeles · 2 sites	Parent on file	19	37	Decision makers
370	San Fernando Valley Medical Group IncSherman Oaks · 4 sites	-	19	37	Decision makers
371	Center for Advanced Cardiac and Vascular InterventionsLos Angeles · 3 sites	-	19	27	Decision makers
372	SCKE HealthLaguna Hills · 3 sites	-	19	25	Decision makers
373	Inland Physicians Medical GroupMontclair · 5 sites	-	19	20	Decision makers
374	Compassionate Critical CareWoodland Hills · 1 site	Parent on file	19	19	Decision makers
375	Cardiovascular Institute of San DiegoChula Vista · 4 sites	-	18	25	Decision makers
376	SharpCare Medical GroupCoronado · 7 sites	Parent on file	18	25	Decision makers
377	Paloma Medical GroupSan Juan Capistrano · 4 sites	-	18	24	Decision makers
378	Caduceus Medical GroupYorba Linda · 3 sites	-	18	23	Decision makers
379	Michael Bain MDNewport Beach · 6 sites	-	18	23	Decision makers
380	Alameda Inpatient Medical, Inc.Alameda · 2 sites	Parent on file	18	22	Decision makers
381	California Kidney SpecialistsSan Dimas · 7 sites	-	18	21	Decision makers
382	Allure Medical GroupNewbury Park · 3 sites	-	18	20	Decision makers
383	Cancer & Blood Specialty ClinicLos Alamitos · 10 sites	-	18	20	Decision makers
384	Heart And Vascular Centers of AmericaSan Diego · 5 sites	-	18	20	Decision makers
385	Scripps Clinic Medical GroupLa Jolla · 4 sites	Parent on file	18	19	Decision makers
386	Southern California Pulmonary Lung CenterGlendale · 3 sites	-	18	19	Decision makers
387	SV Hospitalist Medical GroupSonoma · 2 sites	-	18	18	Decision makers
388	United Hospitalist IncRancho Cucamonga · 2 sites	-	18	18	Decision makers
389	Whittier Pulmonary & Critical Care Medical GroupWhittier · 4 sites	Parent on file	18	18	Decision makers
390	Share OurselvesCosta Mesa · 8 sites	Parent on file	17	47	Decision makers
391	Clinica Medica FamiliarCorona · 6 sites	-	17	40	Decision makers
392	Ava Health PartnersWhittier · 12 sites	-	17	36	Decision makers
393	Monterey Bay GI Consultants Medical GroupMonterey · 3 sites	-	17	28	Decision makers
394	Pacific Shores Medical GroupLong Beach · 9 sites	Parent on file	17	28	Decision makers
395	Orchard HospitalGridley · 2 sites	Parent on file	17	27	Decision makers
396	The Oncology Institute of Hope and InnovationCerritos · 11 sites	Parent on file	17	27	Decision makers
397	Dao Medical GroupGarden Grove · 1 site	-	17	26	Decision makers
398	CareMore Medical GroupCerritos · 13 sites	Parent on file	17	22	Decision makers
399	Merced Intensivist GroupMerced · 2 sites	-	17	21	Decision makers
400	CCU IntensivistsLancaster · 3 sites	Parent on file	17	18	Decision makers

Showing 351 to 400 of 3,969 primary care groups in California

Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data

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