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, 151 to 200
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
151	Innovative Medical Solutions (IMS Med Group)Panorama City · 8 sites	-	70	100	Decision makers
152	Family Choice Medical GroupWestminster · 8 sites	Parent on file	70	73	Decision makers
153	Ampla Health Oroville Medical & DentalOroville · 27 sites	Parent on file	69	183	Decision makers
154	The Oncology Institute of Hope and InnovationCerritos · 49 sites	Parent on file	69	133	Decision makers
155	ConferMEDIrvine · 3 sites	-	69	75	Decision makers
156	Carbon HealthOakland · 91 sites	Parent on file	68	540	Decision makers
157	One MedicalSan Francisco · 25 sites	Parent on file	68	118	Decision makers
158	Accelerated Urgent CareBakersfield · 27 sites	Parent on file	67	313	Decision makers
159	Salud Para La GenteWatsonville · 10 sites	Parent on file	67	130	Decision makers
160	Barton HealthSouth Lake Tahoe · 9 sites	Parent on file	67	85	Decision makers
161	Temecula Valley Hospitalist Medical Group IncTemecula · 9 sites	-	67	85	Decision makers
162	Indian Health Center of Santa Clara ValleySan Jose · 11 sites	Parent on file	66	103	Decision makers
163	Balboa NephrologySan Diego · 27 sites	Parent on file	66	91	Decision makers
164	Regents Of The University Of CaliforniaOrange · 13 sites	Parent on file	66	79	Decision makers
165	Scripps Mercy Physician PartnersSan Diego · 9 sites	Parent on file	66	67	Decision makers
166	CareMore Medical GroupCerritos · 20 sites	Parent on file	65	230	Decision makers
167	InnercareEl Centro · 26 sites	Parent on file	65	148	Decision makers
168	FocusHealthSan Diego · 6 sites	-	65	83	Decision makers
169	Camarena HealthMadera · 30 sites	Parent on file	64	195	Decision makers
170	Rancho Family Medical GroupTemecula · 23 sites	Parent on file	64	145	Decision makers
171	ApolloMed HospitalistsAlhambra · 8 sites	Parent on file	64	79	Decision makers
172	Good Medicine, Inc.Encinitas · 7 sites	-	64	69	Decision makers
173	Epic CareAntioch · 18 sites	-	63	95	Decision makers
174	Barton Memorial HospitalSouth Lake Tahoe · 18 sites	Parent on file	62	102	Decision makers
175	Hazel Hawkins Memorial HospitalHollister · 6 sites	Parent on file	62	79	Decision makers
176	Central City Community Health CenterMonterey Park · 17 sites	Parent on file	61	135	Decision makers
177	La Maestra Community Health CentersSan Diego · 16 sites	Parent on file	61	130	Decision makers
178	High Desert Medical GroupLancaster · 7 sites	Parent on file	61	128	Decision makers
179	TrueCareSan Marcos · 15 sites	Parent on file	59	181	Decision makers
180	Marin Community ClinicsNovato · 12 sites	Parent on file	59	106	Decision makers
181	Centric HealthBakersfield · 16 sites	Parent on file	58	97	Decision makers
182	Emanate Health Medical GroupCovina · 11 sites	Parent on file	58	83	Decision makers
183	Valley Hospitalist Medical GroupVisalia · 4 sites	-	58	64	Decision makers
184	Sutter Santa Rosa Regional HospitalSanta Rosa · 22 sites	Parent on file	57	153	Decision makers
185	AIDS Healthcare FoundationLos Angeles · 82 sites	Parent on file	57	131	Decision makers
186	VituityEmeryville · 7 sites	Parent on file	57	87	Decision makers
187	Bay Area Community HealthFremont · 16 sites	Parent on file	56	178	Decision makers
188	Telehealth Medical GroupSanta Rosa · 20 sites	-	55	56	Decision makers
189	Petaluma Health CenterPetaluma · 6 sites	Parent on file	54	138	Decision makers
190	DAP HealthPalm Springs · 18 sites	Parent on file	54	133	Decision makers
191	Lanterman Developmental CenterPomona · 10 sites	Parent on file	54	65	Decision makers
192	Unicare Community Health CenterOntario · 23 sites	Parent on file	53	160	Decision makers
193	Hoag Medical GroupIrvine · 20 sites	Parent on file	53	134	Decision makers
194	AMG Medical GroupAlhambra · 12 sites	Parent on file	53	93	Decision makers
195	GeriNet Medical AssociatesCosta Mesa · 7 sites	Parent on file	52	108	Decision makers
196	IM-FSR Inc.Chino Hills · 7 sites	-	52	70	Decision makers
197	UCR HealthRiverside · 5 sites	Parent on file	52	61	Decision makers
198	AristaMDSan Diego · 6 sites	Parent on file	52	54	Decision makers
199	CommuniCare+OLENapa · 21 sites	Parent on file	51	143	Decision makers
200	AmpleHealthCarmichael · 7 sites	-	51	61	Decision makers

Showing 151 to 200 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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