Updated October 2026

Medical groups in California

Medical group directory
California

Medical groups: 10,378
Multi-specialty: 2,304
Single-specialty: 8,073
More than one site: 4,683
100+ physicians: 219

There are 10,378 medical groups in California with a Medicare PAC ID. The Permanente Medical Group, Inc. is the largest, with 11,708 California physicians. Kaiser Permanente has the most physicians across its groups, 22,698, and 73% of California groups are independent.

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The Permanente Medical Group, Inc. is the largest medical 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. 219 California groups have 100 or more physicians.

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Medical groups in California, ranked by physicians, 101 to 150
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
101	Salinas Valley Health ClinicsSalinas · 24 sites	Parent on file	215	326	Decision makers
102	UCI Health Family Health Center, AnaheimAnaheim · 17 sites	Parent on file	214	268	Decision makers
103	CEP AmericaEmeryville · 31 sites	Parent on file	213	290	Decision makers
104	GENESIS Older Adult Program (Los Angeles County Department of Mental Health)Los Angeles · 120 sites	Parent on file	212	729	Decision makers
105	Community Memorial HealthcareVentura · 38 sites	Parent on file	212	302	Decision makers
106	Adventist Health ReedleyReedley · 15 sites	Parent on file	205	298	Decision makers
107	UCLA Medical Group (UCLA Health)Los Angeles · 45 sites	Parent on file	203	243	Decision makers
108	Team Physicians of California Medical Group IncDelano · 15 sites	-	201	340	Decision makers
109	Pacific Central Coast Health Centers Medical GroupSanta Maria · 50 sites	Parent on file	199	316	Decision makers
110	Renaissance Imaging Medical AssociatesNorthridge · 142 sites	Parent on file	199	203	Decision makers
111	On-Call SpecialistsSan Diego · 23 sites	-	197	214	Decision makers
112	OptumCare Medical GroupLos Alamitos · 38 sites	Parent on file	194	286	Decision makers
113	UC San Diego HealthLos Angeles · 15 sites	Parent on file	193	274	Decision makers
114	Golden Valley Health CentersMerced · 60 sites	Parent on file	188	449	Decision makers
115	Pacific Inpatient Medical GroupSan Francisco · 18 sites	Parent on file	186	206	Decision makers
116	Family HealthCare NetworkVisalia · 73 sites	Parent on file	184	516	Decision makers
117	UCI HealthOrange · 14 sites	Parent on file	182	227	Decision makers
118	San Francisco International Airport (SFO) Medical ClinicSan Francisco · 43 sites	Parent on file	181	218	Decision makers
119	Kern County Public Health DepartmentBakersfield · 38 sites	Parent on file	180	396	Decision makers
120	Acute Care Surgery Medical GroupSacramento · 46 sites	-	175	245	Decision makers
121	Quantum Bay Area Hospitalist Medical Group IncMountain View · 8 sites	-	172	174	Decision makers
122	Seven Star Medical GroupHemet · 28 sites	-	170	249	Decision makers
123	Signify HealthSan Francisco · 15 sites	Parent on file	168	302	Decision makers
124	Adventist Health Lodi MemorialLodi · 11 sites	Parent on file	168	198	Decision makers
125	Superior Hospitalist Medical GroupLos Angeles · 18 sites	-	168	184	Decision makers
126	UCI Department of Radiological SciencesOrange · 9 sites	Parent on file	167	173	Decision makers
127	Community Hospital of the Monterey PeninsulaMonterey · 11 sites	Parent on file	165	243	Decision makers
128	Bay Imaging ConsultantsWalnut Creek · 100 sites	-	165	183	Decision makers
129	Southern California Hospitalist NetworkOrange · 14 sites	Parent on file	165	178	Decision makers
130	UCLA Medical GroupLos Angeles · 10 sites	Parent on file	162	200	Decision makers
131	Huntington Health PhysiciansPasadena · 16 sites	Parent on file	160	201	Decision makers
132	Silicon Valley Diagnostic Imaging (SVDI)Mountain View · 102 sites	Parent on file	157	159	Decision makers
133	UCI Health PhysiciansOrange · 16 sites	Parent on file	156	203	Decision makers
134	Pacific Valley Medical GroupPasadena · 17 sites	-	156	200	Decision makers
135	VituityRedding · 11 sites	Parent on file	156	174	Decision makers
136	CASE Medical GroupSacramento · 6 sites	-	155	156	Decision makers
137	Unio Specialty Care, Urology, Encinitas (formerly Genesis Healthcare Partners)Encinitas · 67 sites	Parent on file	154	295	Decision makers
138	Palomar Health Medical GroupPoway · 23 sites	Parent on file	154	216	Decision makers
139	UCLA HealthLos Angeles · 17 sites	Parent on file	153	340	Decision makers
140	Washington Health Medical GroupFremont · 23 sites	Parent on file	153	203	Decision makers
141	Hospitalists of Modesto Medical GroupModesto · 11 sites	Parent on file	151	171	Decision makers
142	Emergency Physicians AssociatesSan Jose · 11 sites	Parent on file	150	194	Decision makers
143	Clinica Sierra VistaFresno · 43 sites	Parent on file	149	360	Decision makers
144	Sacramento County Division of Behavioral Health ServicesSacramento · 47 sites	Parent on file	148	314	Decision makers
145	San Bernardino County Behavioral HealthSan Bernardino · 32 sites	Parent on file	148	248	Decision makers
146	One MedicalSan Francisco · 69 sites	Parent on file	147	350	Decision makers
147	Darin Rentz DO PCSan Clemente · 18 sites	Parent on file	147	203	Decision makers
148	Lakeside Community HealthcareNorthridge · 16 sites	Parent on file	146	264	Decision makers
149	Mee Memorial Healthcare SystemKing City · 4 sites	Parent on file	146	183	Decision makers
150	Adventist Health SonoraSonora · 19 sites	Parent on file	145	214	Decision makers

Showing 101 to 150 of 10,378 medical groups in California

Sources: Doctors and Clinicians National Downloadable File (CMS) and Dmand AI Affiliation Data

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