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, 401 to 450
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
401	United Inpatient ConsultantsSimi Valley · 1 site	-	17	18	Decision makers
402	Del Sur HealthcareEl Cajon · 3 sites	-	16	78	Decision makers
403	Mend Urgent CareSherman Oaks · 5 sites	Parent on file	16	56	Decision makers
404	All For Health, Health For AllGlendale · 13 sites	Parent on file	16	52	Decision makers
405	Family Care Centers - IrvineIrvine · 4 sites	Parent on file	16	41	Decision makers
406	Clínica Médica FamiliarCorona · 6 sites	-	16	34	Decision makers
407	Imperial Valley Rural Health ClinicBrawley · 4 sites	-	16	31	Decision makers
408	John C. Fremont Healthcare DistrictMariposa · 4 sites	Parent on file	16	26	Decision makers
409	USC Care Medical GroupLos Angeles · 6 sites	Parent on file	16	23	Decision makers
410	El Camino Medical AssociatesLos Gatos · 6 sites	Parent on file	16	20	Decision makers
411	Superclinic Professionals Medical CorpNorth Hollywood · 3 sites	-	16	20	Decision makers
412	Advanced Cardiovascular SpecialistsMountain View · 2 sites	Parent on file	16	18	Decision makers
413	Coastal Pulmonary AssociatesEncinitas · 5 sites	-	16	18	Decision makers
414	Prestige Pulmonary Consultants IncMonterey Park · 1 site	-	16	18	Decision makers
415	San Pedro Hospitalist Medical GroupEl Segundo · 2 sites	-	16	17	Decision makers
416	Springhill Medical GroupPittsburg · 2 sites	Parent on file	16	17	Decision makers
417	Centinela Medical GroupInglewood · 2 sites	-	16	16	Decision makers
418	Muir Pulmonary Critical Care and Sleep MedicineWalnut Creek · 2 sites	-	16	16	Decision makers
419	UCLA Health, Torrance Skypark Specialty CareTorrance · 3 sites	Parent on file	16	16	Decision makers
420	Blue Stone Health & WellnessWeimar · 4 sites	Parent on file	15	44	Decision makers
421	UCLA Medical GroupLos Angeles · 6 sites	Parent on file	15	41	Decision makers
422	New Foundation Medical GroupSanta Ana · 3 sites	-	15	40	Decision makers
423	Coastal Health AlliancePoint Reyes Station · 3 sites	Parent on file	15	39	Decision makers
424	Virta HealthSan Francisco · 2 sites	-	15	36	Decision makers
425	UMMA Community ClinicLos Angeles · 5 sites	Parent on file	15	34	Decision makers
426	Cajon Medical GroupRedlands · 19 sites	-	15	33	Decision makers
427	Clinica Medica FamiliarCorona · 9 sites	-	15	30	Decision makers
428	Jiva HealthConcord · 5 sites	-	15	23	Decision makers
429	Mayflower Medical GroupWest Covina · 7 sites	-	15	22	Decision makers
430	Central Coast Family CareSana Maria · 9 sites	-	15	19	Decision makers
431	Hill HealthOakland · 3 sites	Parent on file	15	19	Decision makers
432	Mt. San Antonio GardensPomona · 4 sites	Parent on file	15	19	Decision makers
433	Talia Medical GroupTemecula · 2 sites	Parent on file	15	18	Decision makers
434	Advantage HospitalistsAgoura Hills · 3 sites	-	15	17	Decision makers
435	Roseville CardiologyRoseville · 2 sites	-	15	17	Decision makers
436	Sacramento Heart & Vascular Medical AssociatesSacramento · 4 sites	-	15	17	Decision makers
437	San Jose GastroenterologySan Jose · 3 sites	-	15	17	Decision makers
438	Coastal HealthcareWatsonville · 3 sites	Parent on file	15	16	Decision makers
439	ComCare Primary Medical GroupGlendale · 10 sites	-	15	16	Decision makers
440	KAAJ HealthcareSan Jose · 5 sites	-	15	15	Decision makers
441	North State Hospitalist Medical Group, Inc.Mount Shasta · 1 site	-	15	15	Decision makers
442	South Central Family Health CenterLos Angeles · 12 sites	Parent on file	14	56	Decision makers
443	Big Valley Health CenterBieber · 13 sites	Parent on file	14	43	Decision makers
444	Presidium Medical Group, San DiegoSan Diego · 5 sites	Parent on file	14	42	Decision makers
445	Mommy & Me Medical GroupRiverside · 5 sites	-	14	26	Decision makers
446	Clinica Medica GeneralEl Monte · 4 sites	Parent on file	14	25	Decision makers
447	K'ima:w Medical CenterHoopa · 4 sites	Parent on file	14	24	Decision makers
448	Los Angeles Jewish HealthReseda · 3 sites	Parent on file	14	23	Decision makers
449	Cardiovascular Medical Group of Southern CaliforniaBeverly Hills · 3 sites	-	14	21	Decision makers
450	Stockton Cardiology Medical GroupStockton · 5 sites	-	14	21	Decision makers

Showing 401 to 450 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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