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, 301 to 350
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
301	West Coast Wound & Skin CareBurbank · 16 sites	-	26	97	Decision makers
302	Merced Faculty Associates Medical Group (MFA)Merced · 16 sites	-	26	50	Decision makers
303	Choice Medical GroupApple Valley · 8 sites	Parent on file	26	41	Decision makers
304	Seneca Healthcare DistrictChester · 2 sites	Parent on file	26	37	Decision makers
305	El Proyecto del BarrioArleta · 8 sites	Parent on file	25	85	Decision makers
306	One MedicalSan Francisco · 17 sites	Parent on file	25	69	Decision makers
307	Tri-Valley Medical GroupMurrieta · 6 sites	-	25	45	Decision makers
308	San Diego Sports Medicine & Family Health CenterSan Diego · 4 sites	-	25	44	Decision makers
309	San Diego Cardiac CenterSan Diego · 5 sites	Parent on file	25	35	Decision makers
310	Sutter Coast HospitalCrescent City · 5 sites	Parent on file	25	34	Decision makers
311	Axon NeurologyGlendale · 4 sites	-	25	28	Decision makers
312	Henry Mayo Newhall HospitalValencia · 5 sites	Parent on file	25	27	Decision makers
313	San Francisco Lung & SleepSan Francisco · 3 sites	-	25	27	Decision makers
314	Bolsa Medical GroupWestminster · 1 site	-	25	26	Decision makers
315	SolaceRedwood City · 40 sites	-	25	26	Decision makers
316	Alliance Medical CenterHealdsburg · 4 sites	Parent on file	24	59	Decision makers
317	Ravenswood Family Health NetworkEast Palo Alto · 7 sites	Parent on file	24	54	Decision makers
318	Enloe Specialty PhysiciansChico · 4 sites	Parent on file	24	43	Decision makers
319	Redlands Family PracticeRedlands · 2 sites	Parent on file	24	42	Decision makers
320	Family Care Specialists (FCS) Medical CorporationLos Angeles · 5 sites	Parent on file	24	33	Decision makers
321	West Coast Pulmonary & Sleep Disorders CenterOxnard · 3 sites	-	24	32	Decision makers
322	Apex Healthcare Medical CenterHemet · 6 sites	Parent on file	24	30	Decision makers
323	Benchmark Hospitalists & IntensivistsEl Segundo · 3 sites	Parent on file	24	27	Decision makers
324	Desert Physicians Medical GroupPalm Springs · 3 sites	-	24	27	Decision makers
325	Hp Intensivist Medical Group, Inc.Los Angeles · 1 site	-	24	25	Decision makers
326	Rocket DoctorSanta Monica · 2 sites	Parent on file	24	25	Decision makers
327	Southern California Family Medical CenterEl Monte · 4 sites	-	23	50	Decision makers
328	Summit Family Health CenterFontana · 6 sites	-	23	50	Decision makers
329	Dignity Health, Mark Twain Medical CenterSan Andreas · 4 sites	Parent on file	23	48	Decision makers
330	Providence Queen of the Valley Medical CenterNapa · 10 sites	Parent on file	23	37	Decision makers
331	Benchmark Hospitalists & IntensivistsEscondido · 5 sites	Parent on file	23	23	Decision makers
332	Housecall Doctors Medical GroupLong Beach · 6 sites	-	22	136	Decision makers
333	PIH Health Physicians (John M. Geiss, DO)Santa Ana · 22 sites	Parent on file	22	112	Decision makers
334	Baywell HealthOakland · 4 sites	Parent on file	22	69	Decision makers
335	Valley Community HealthcareNorth Hollywood · 3 sites	Parent on file	22	59	Decision makers
336	Legacy MD Medical GroupEl Centro · 8 sites	-	22	46	Decision makers
337	Care Partners California Medical PCCosta Mesa · 5 sites	Parent on file	22	37	Decision makers
338	Pinnacle Health CareSalinas · 4 sites	Parent on file	22	31	Decision makers
339	Concord Hospitalist GroupGlendale · 2 sites	-	22	24	Decision makers
340	Wound Physicians of California, P.C.Dinuba · 4 sites	-	22	23	Decision makers
341	Senior DocOrange · 4 sites	Parent on file	21	78	Decision makers
342	Santa Barbara Neighborhood ClinicsSanta Barbara · 9 sites	Parent on file	21	47	Decision makers
343	UCLA Medical GroupLos Angeles · 9 sites	Parent on file	21	44	Decision makers
344	Mission Neighborhood Health CenterSan Francisco · 7 sites	Parent on file	21	42	Decision makers
345	Excell Medical GroupParamount · 5 sites	Parent on file	21	38	Decision makers
346	COR Healthcare Medical AssociatesTorrance · 6 sites	-	21	31	Decision makers
347	Golden State Pediatrics and Family MedicineFontana · 6 sites	-	21	31	Decision makers
348	Pathway Medical GroupGarden Grove · 6 sites	-	21	29	Decision makers
349	Southern California Kidney ConsultantsGarden Grove · 4 sites	-	21	28	Decision makers
350	Seven Star Medical GroupHemet · 11 sites	-	21	26	Decision makers

Showing 301 to 350 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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