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, 201 to 250
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
201	Stanislaus County Behavioral Health and Recovery ServicesModesto · 29 sites	Parent on file	50	110	Decision makers
202	Nephrology Associates Medical GroupRiverside · 13 sites	-	50	73	Decision makers
203	Central Valley Critical Care MedicineVisalia · 5 sites	-	50	54	Decision makers
204	El Camino HealthMountain View · 4 sites	Parent on file	50	54	Decision makers
205	WellSpace HealthSacramento · 25 sites	Parent on file	49	138	Decision makers
206	Skilled Physicians GroupLos Angeles · 4 sites	-	49	61	Decision makers
207	Fresno Long Term Care Medical GroupFresno · 24 sites	-	48	81	Decision makers
208	Barton Health (Barton Memorial Hospital)South Lake Tahoe · 10 sites	Parent on file	48	72	Decision makers
209	Arcadia Hospitalist Medical GroupArcadia · 7 sites	-	47	65	Decision makers
210	Central Coast Inpatient ConsultantsSanta Maria · 6 sites	Parent on file	47	51	Decision makers
211	Circle MedicalSan Francisco · 24 sites	Parent on file	46	159	Decision makers
212	Doctors on Duty Medical ClinicsMonterey · 13 sites	Parent on file	46	131	Decision makers
213	Jiva HealthConcord · 24 sites	-	46	83	Decision makers
214	One MedicalSan Francisco · 18 sites	Parent on file	46	71	Decision makers
215	Los Angeles County Department of Public HealthCommerce · 12 sites	Parent on file	46	63	Decision makers
216	West Coast Kidney InstituteConcord · 15 sites	-	46	60	Decision makers
217	VituityEmeryville · 5 sites	Parent on file	46	58	Decision makers
218	Premier Family Medicine AssociatesPomona · 5 sites	Parent on file	45	70	Decision makers
219	UCLA Medical Group (UCLA Health)Los Angeles · 5 sites	Parent on file	44	50	Decision makers
220	California Cardiovascular Consultants and Medical AssociatesFremont · 10 sites	-	44	46	Decision makers
221	Bartz-Altadonna Community Health CenterLancaster · 4 sites	Parent on file	43	83	Decision makers
222	Shasta Regional Medical GroupRedding · 6 sites	Parent on file	43	60	Decision makers
223	Bel Air Critical Care Medical GroupLos Angeles · 4 sites	-	43	54	Decision makers
224	Vibra HealthcareFresno · 15 sites	Parent on file	43	46	Decision makers
225	Complete Care Community Health CenterLos Angeles · 17 sites	Parent on file	42	110	Decision makers
226	San Manuel Indian Health ClinicGrand Terrace · 18 sites	Parent on file	42	105	Decision makers
227	Adventist Health Community Care-HanfordHanford · 5 sites	Parent on file	42	87	Decision makers
228	Seaside Emergency AssociatesVentura · 5 sites	Parent on file	42	59	Decision makers
229	One Community HealthSacramento · 9 sites	Parent on file	41	100	Decision makers
230	Planned Parenthood Northern CaliforniaConcord · 22 sites	Parent on file	41	67	Decision makers
231	East Campus Hospitalist Medical Group, Inc.El Segundo · 5 sites	-	41	47	Decision makers
232	Chest Medicine & Critical CareSan Diego · 10 sites	-	41	46	Decision makers
233	St. Joseph Hospitalist Medical GroupBurbank · 10 sites	Parent on file	41	43	Decision makers
234	Alertive Healthcare Medical GroupRiverside · 4 sites	Parent on file	40	50	Decision makers
235	Arya Medical GroupFresno · 8 sites	-	40	47	Decision makers
236	Elica Health CentersSacramento · 15 sites	Parent on file	39	111	Decision makers
237	Los Angeles Cancer NetworkGlendale · 25 sites	-	39	71	Decision makers
238	XiMED HospitalistsLa Jolla · 5 sites	Parent on file	39	43	Decision makers
239	Pacific Inpatient PhysiciansVentura · 3 sites	Parent on file	39	42	Decision makers
240	Clinica de Salud del Valle de SalinasSalinas · 17 sites	Parent on file	38	78	Decision makers
241	Epic Medical GroupSherman Oaks · 7 sites	Parent on file	38	68	Decision makers
242	Chinese HospitalSan Francisco · 7 sites	Parent on file	38	56	Decision makers
243	Cedar Springs Hospitalist Medical Group IncGlendale · 7 sites	-	38	53	Decision makers
244	Crescent Wound CareLa Jolla · 5 sites	Parent on file	38	42	Decision makers
245	Peninsula Hospitalist AssociatesBurlingame · 2 sites	-	38	39	Decision makers
246	Chapa-De Indian HealthAuburn · 8 sites	Parent on file	37	86	Decision makers
247	Willow Brook Critical Care Medical Group IncGlendale · 7 sites	-	37	65	Decision makers
248	Sunrise Medical AssociatesCorona · 4 sites	Parent on file	37	46	Decision makers
249	SFUPG Medical GroupSan Francisco · 5 sites	-	37	37	Decision makers
250	CommuniCare+OLEDavis · 9 sites	Parent on file	36	104	Decision makers

Showing 201 to 250 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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