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, 451 to 500
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
451	Gap Post-Acute Care ServicesLos Angeles · 2 sites	-	14	20	Decision makers
452	Paloma Medical GroupSan Juan Capistrano · 7 sites	-	14	20	Decision makers
453	Diablo Infectious DiseasesSan Leandro · 4 sites	-	14	18	Decision makers
454	Innovative Medical GroupTemecula · 2 sites	-	14	17	Decision makers
455	Hematology Oncology SpecialistsLos Angeles · 15 sites	-	14	15	Decision makers
456	Pulmonary AssociatesBurlingame · 2 sites	-	14	15	Decision makers
457	Cardiovascular Consultants Medical GroupEncino · 6 sites	-	14	14	Decision makers
458	HealthTapSunnyvale · 4 sites	-	14	14	Decision makers
459	Comprehensive Blood & Cancer CenterBakersfield · 2 sites	Parent on file	13	34	Decision makers
460	Living Water Community Health and Wellness Clinic (Living Water Clinic)Porterville · 3 sites	-	13	34	Decision makers
461	Bear Valley Community HospitalBig Bear Lake · 2 sites	Parent on file	13	28	Decision makers
462	Clinica Medica GeneralLos Angeles · 1 site	Parent on file	13	27	Decision makers
463	Castle Family Health CentersAtwater · 6 sites	Parent on file	13	26	Decision makers
464	Perpetual Medical GroupLos Angeles · 1 site	-	13	23	Decision makers
465	Roots Community HealthOakland · 3 sites	Parent on file	13	23	Decision makers
466	Amistad Medical ClinicsSanta Ana · 6 sites	-	13	22	Decision makers
467	Capital Nephrology Medical GroupSacramento · 7 sites	-	13	22	Decision makers
468	Southern California Heart CentersSan Gabriel · 1 site	-	13	21	Decision makers
469	Bakersfield Family Medical CenterBakersfield · 4 sites	Parent on file	13	20	Decision makers
470	Key Medical GroupVisalia · 8 sites	Parent on file	13	20	Decision makers
471	Edinger Medical GroupHuntington Beach · 4 sites	-	13	18	Decision makers
472	Prime MedicalSan Pedro · 3 sites	-	13	18	Decision makers
473	Apex Medical GroupLos Banos · 2 sites	-	13	17	Decision makers
474	Garfield Health CenterMonterey Park · 2 sites	Parent on file	13	17	Decision makers
475	Epic Medical GroupSherman Oaks · 8 sites	Parent on file	13	16	Decision makers
476	Coastal HealthcareWatsonville · 4 sites	Parent on file	13	15	Decision makers
477	Medical Oncology Associates of San Diego (MOASD)San Diego · 6 sites	-	13	15	Decision makers
478	California Heart AssociatesFountain Valley · 4 sites	-	13	14	Decision makers
479	Elite Medical Group Of Southern CaliforniaRancho Cucamonga · 2 sites	Parent on file	13	14	Decision makers
480	Inland Physicians Medical GroupMontclair · 2 sites	-	13	14	Decision makers
481	Valley Heart Associates Medical GroupModesto · 2 sites	-	13	14	Decision makers
482	Asad U Khaja MD INC.Torrance · 2 sites	Parent on file	13	13	Decision makers
483	Community Alliance Medical GroupYucaipa · 5 sites	-	13	13	Decision makers
484	DrHouseOakland · 2 sites	-	13	13	Decision makers
485	Tiburcio Vasquez Health CenterHayward · 11 sites	Parent on file	12	62	Decision makers
486	Carbon HealthOakland · 23 sites	Parent on file	12	44	Decision makers
487	Davis Street Primary Care ClinicSan Leandro · 2 sites	Parent on file	12	44	Decision makers
488	Capital Medical Extended CareFair Oaks · 3 sites	Parent on file	12	41	Decision makers
489	NH Health CenterGarden Grove · 1 site	-	12	31	Decision makers
490	Altais Medical Group \| Bay WestSan Francisco · 7 sites	Parent on file	12	28	Decision makers
491	Legacy MD Medical GroupEl Centro · 2 sites	-	12	25	Decision makers
492	Eldorado Community Service Center - InglewoodInglewood · 12 sites	-	12	21	Decision makers
493	Sierra Medical GroupLancaster · 4 sites	Parent on file	12	21	Decision makers
494	Palmdale Intensivist IncEl Segundo · 2 sites	Parent on file	12	20	Decision makers
495	Digestive Care ConsultantsTorrance · 1 site	-	12	19	Decision makers
496	Elevate Health GroupGlendale · 3 sites	-	12	19	Decision makers
497	Clarkian MedicalDaly City · 1 site	-	12	18	Decision makers
498	DLR Family Medicine Medical GroupSan Clemente · 3 sites	-	12	17	Decision makers
499	East Bay Center for Digestive HealthOakland · 1 site	-	12	17	Decision makers
500	West Coast Pulmonary & Sleep Disorders CenterOxnard · 3 sites	-	12	17	Decision makers

Showing 451 to 500 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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