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, 201 to 250
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
201	Community Regional Medical CenterFresno · 12 sites	Parent on file	112	116	Decision makers
202	La Clinica De La RazaConcord · 23 sites	Parent on file	111	240	Decision makers
203	VituityEmeryville · 68 sites	Parent on file	111	119	Decision makers
204	John Muir Health Magnetic Imaging CenterWalnut Creek · 41 sites	Parent on file	111	116	Decision makers
205	Northeast Valley Health CorporationSan Fernando · 27 sites	Parent on file	110	253	Decision makers
206	Adventist Health White MemorialLos Angeles · 9 sites	Parent on file	110	127	Decision makers
207	Bay Psychiatric AssociatesBerkeley · 9 sites	-	110	112	Decision makers
208	Sierra Emergency Medical GroupPleasanton · 15 sites	Parent on file	109	162	Decision makers
209	Merced Hospitalist Medical GroupMerced · 13 sites	-	109	121	Decision makers
210	Community Health Centers of the Central Coast, Inc.Santa Maria · 35 sites	Parent on file	108	222	Decision makers
211	Chaparral Medical GroupPomona · 34 sites	Parent on file	108	154	Decision makers
212	BayChildren's Medical GroupEmeryville · 23 sites	Parent on file	108	153	Decision makers
213	San Jose Medical GroupSan Jose · 14 sites	-	108	121	Decision makers
214	VituityModesto · 56 sites	Parent on file	108	120	Decision makers
215	Adventist Health HanfordHanford · 5 sites	Parent on file	104	117	Decision makers
216	Adventist Health Clear LakeClearlake · 8 sites	Parent on file	103	188	Decision makers
217	Ridgeline Emergency Physicians Medical Group, Inc.Northridge · 22 sites	-	100	168	Decision makers
218	UCSF Benioff Children’s PhysiciansEmeryville · 29 sites	Parent on file	100	167	Decision makers
219	Emanate Health Medical GroupWest Covina · 13 sites	Parent on file	100	143	Decision makers
220	Pacific Hospitalist AssociatesNewport Beach · 6 sites	-	99	101	Decision makers
221	UCLA Jules Stein Eye InstituteLos Angeles · 17 sites	Parent on file	98	125	Decision makers
222	Chase Dennis Emergency Medical GroupSanta Rosa · 7 sites	-	98	113	Decision makers
223	Eisenhower Medical AssociatesRancho Mirage · 9 sites	Parent on file	97	108	Decision makers
224	Doctor on DemandSan Francisco · 38 sites	Parent on file	95	305	Decision makers
225	Clinic Services Of California Medical Group IncPleasanton · 8 sites	-	95	192	Decision makers
226	Intercommunity Emergency Medical GroupWhittier · 9 sites	-	95	154	Decision makers
227	Desert Valley Medical GroupVictorville · 15 sites	Parent on file	95	151	Decision makers
228	Anesthesia & Analgesia Medical Group, Inc.Santa Rosa · 11 sites	-	95	113	Decision makers
229	Adventist Health Delano Medical CenterDelano · 3 sites	Parent on file	95	111	Decision makers
230	Torrance Memorial Medical CenterTorrance · 8 sites	Parent on file	95	102	Decision makers
231	Sol RadiologyVictorville · 96 sites	Parent on file	95	95	Decision makers
232	Optum (formerly Pinnacle Medical Group)Fontana · 11 sites	Parent on file	94	139	Decision makers
233	Trinity HospitalWeaverville · 3 sites	Parent on file	94	126	Decision makers
234	UCI Health PhysiciansOrange · 8 sites	Parent on file	94	121	Decision makers
235	NES HealthPorterville · 10 sites	Parent on file	93	164	Decision makers
236	San Joaquin Emergency Medical AssociatesMerced · 11 sites	-	93	151	Decision makers
237	Lompoc Valley Medical CenterLompoc · 8 sites	Parent on file	93	123	Decision makers
238	EM AllianceMurrieta · 7 sites	Parent on file	92	142	Decision makers
239	Hospitalist Group of MontebelloCorona · 11 sites	-	92	113	Decision makers
240	CMI Radiology GroupFresno · 38 sites	-	92	99	Decision makers
241	Ridgecrest Regional HospitalRidgecrest · 6 sites	Parent on file	91	143	Decision makers
242	Can Emergency Physicians Medical GroupBurbank · 9 sites	Parent on file	91	122	Decision makers
243	Riverside Faculty Medical GroupMoreno Valley · 4 sites	Parent on file	91	108	Decision makers
244	Open Door Community Health CentersArcata · 25 sites	Parent on file	89	212	Decision makers
245	Health & Human Services AgencySan Diego · 10 sites	Parent on file	89	135	Decision makers
246	Adventist Health TulareTulare · 1 site	Parent on file	89	98	Decision makers
247	Valley Radiology ImagingSan Jose · 16 sites	Parent on file	89	95	Decision makers
248	West Valley Radiology GroupWest Hills · 53 sites	-	89	90	Decision makers
249	Esparto Family PracticeEsparto · 31 sites	Parent on file	88	195	Decision makers
250	Apex Emergency Medical GroupHemet · 16 sites	-	88	143	Decision makers

Showing 201 to 250 of 10,378 medical groups in California

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

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