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, 101 to 150
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
101	American Specialty Physicians GroupModesto · 13 sites	-	125	172	Decision makers
102	Venice Family ClinicVenice · 16 sites	Parent on file	123	201	Decision makers
103	Montage Medical GroupCarmel · 8 sites	Parent on file	122	152	Decision makers
104	Perlman ClinicLa Jolla · 46 sites	-	121	501	Decision makers
105	Tahoe Forest MultiSpecialty ClinicsTruckee · 14 sites	Parent on file	121	167	Decision makers
106	North East Medical Services (NEMS)Daly City · 27 sites	Parent on file	120	208	Decision makers
107	Cottage Medical GroupSanta Barbara · 18 sites	Parent on file	118	149	Decision makers
108	LifeLong Medical CareBerkeley · 23 sites	Parent on file	116	274	Decision makers
109	St. John's Community HealthLos Angeles · 29 sites	Parent on file	114	455	Decision makers
110	Kaweah Health Cardiothoracic Surgery ClinicVisalia · 31 sites	Parent on file	114	241	Decision makers
111	Santa Rosa Community HealthSanta Rosa · 16 sites	Parent on file	114	225	Decision makers
112	Desert Oasis HealthcarePalm Springs · 17 sites	Parent on file	112	241	Decision makers
113	Community Regional Medical CenterFresno · 12 sites	Parent on file	112	116	Decision makers
114	La Clinica De La RazaConcord · 23 sites	Parent on file	111	240	Decision makers
115	Merced Hospitalist Medical GroupMerced · 13 sites	-	109	121	Decision makers
116	Community Health Centers of the Central Coast, Inc.Santa Maria · 35 sites	Parent on file	108	222	Decision makers
117	Chaparral Medical GroupPomona · 34 sites	Parent on file	108	154	Decision makers
118	San Jose Medical GroupSan Jose · 14 sites	-	108	121	Decision makers
119	Emanate Health Medical GroupWest Covina · 13 sites	Parent on file	100	143	Decision makers
120	Eisenhower Medical AssociatesRancho Mirage · 9 sites	Parent on file	97	108	Decision makers
121	Clinic Services Of California Medical Group IncPleasanton · 8 sites	-	95	192	Decision makers
122	Desert Valley Medical GroupVictorville · 15 sites	Parent on file	95	151	Decision makers
123	Optum (formerly Pinnacle Medical Group)Fontana · 11 sites	Parent on file	94	139	Decision makers
124	Hospitalist Group of MontebelloCorona · 11 sites	-	92	113	Decision makers
125	Ridgecrest Regional HospitalRidgecrest · 6 sites	Parent on file	91	143	Decision makers
126	Riverside Faculty Medical GroupMoreno Valley · 4 sites	Parent on file	91	108	Decision makers
127	Open Door Community Health CentersArcata · 25 sites	Parent on file	89	212	Decision makers
128	Esparto Family PracticeEsparto · 31 sites	Parent on file	88	195	Decision makers
129	UCI HealthOrange · 10 sites	Parent on file	87	122	Decision makers
130	Palomar Hospitalist Medical GroupEscondido · 8 sites	-	87	96	Decision makers
131	Encinitas Hospitalist AssociatesEncinitas · 8 sites	-	86	90	Decision makers
132	Clinicas del Camino Real, Inc.Ventura · 20 sites	Parent on file	83	236	Decision makers
133	Graybill Medical GroupEscondido · 11 sites	-	83	131	Decision makers
134	Northern Inyo HospitalBishop · 3 sites	Parent on file	83	99	Decision makers
135	Exer Urgent CareLos Angeles · 38 sites	Parent on file	80	159	Decision makers
136	Community Health Centers of AmericaMariposa · 12 sites	Parent on file	76	182	Decision makers
137	ARC Physical TherapyTempleton · 22 sites	-	76	109	Decision makers
138	Wesley Health Centers - JWCH Institute, Inc.Commerce · 25 sites	Parent on file	75	245	Decision makers
139	Asian Health ServicesOakland · 8 sites	Parent on file	75	134	Decision makers
140	Skilled Physicians GroupGlendale · 43 sites	-	75	116	Decision makers
141	Pulmonary Medicine AssociatesSacramento · 7 sites	-	73	118	Decision makers
142	Saddleback Medical GroupLaguna Hills · 8 sites	-	73	90	Decision makers
143	San Diego Critical Care Medical GroupEl Cajon · 7 sites	-	73	83	Decision makers
144	Marin Hospitalist Medical GroupGreenbrae · 7 sites	-	73	77	Decision makers
145	Pacific Pulmonary Medical GroupRiverside · 7 sites	-	72	124	Decision makers
146	UCLA Health (UCLA Medical Group)Los Angeles · 17 sites	Parent on file	72	80	Decision makers
147	Shasta Community Health CenterRedding · 14 sites	Parent on file	71	153	Decision makers
148	Fairchild Medical CenterYreka · 3 sites	Parent on file	71	137	Decision makers
149	TeleMed2URoseville · 8 sites	Parent on file	70	164	Decision makers
150	Chest and Critical Care ConsultantsAnaheim · 9 sites	-	70	100	Decision makers

Showing 101 to 150 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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