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, 301 to 350
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
301	Eisenhower Radiology Medical GroupRancho Mirage · 97 sites	-	74	78	Decision makers
302	Pulmonary Medicine AssociatesSacramento · 7 sites	-	73	118	Decision makers
303	Saddleback Medical GroupLaguna Hills · 8 sites	-	73	90	Decision makers
304	San Diego Critical Care Medical GroupEl Cajon · 7 sites	-	73	83	Decision makers
305	Marin Hospitalist Medical GroupGreenbrae · 7 sites	-	73	77	Decision makers
306	Pacific Pulmonary Medical GroupRiverside · 7 sites	-	72	124	Decision makers
307	Surgical AffiliatesLos Banos · 10 sites	Parent on file	72	86	Decision makers
308	UCLA Associated General SurgeonsLos Angeles · 15 sites	Parent on file	72	85	Decision makers
309	UCLA Health (UCLA Medical Group)Los Angeles · 17 sites	Parent on file	72	80	Decision makers
310	Golden State Orthopedics & SpineWalnut Creek · 27 sites	-	71	260	Decision makers
311	Shasta Community Health CenterRedding · 14 sites	Parent on file	71	153	Decision makers
312	Fairchild Medical CenterYreka · 3 sites	Parent on file	71	137	Decision makers
313	Emergency Services Medical CorporationSan Diego · 11 sites	Parent on file	71	77	Decision makers
314	TeleMed2URoseville · 8 sites	Parent on file	70	164	Decision makers
315	Chest and Critical Care ConsultantsAnaheim · 9 sites	-	70	100	Decision makers
316	Innovative Medical Solutions (IMS Med Group)Panorama City · 8 sites	-	70	100	Decision makers
317	Southern Inyo HospitalLone Pine · 3 sites	Parent on file	70	80	Decision makers
318	Family Choice Medical GroupWestminster · 8 sites	Parent on file	70	73	Decision makers
319	Ampla Health Oroville Medical & DentalOroville · 27 sites	Parent on file	69	183	Decision makers
320	The Oncology Institute of Hope and InnovationCerritos · 49 sites	Parent on file	69	133	Decision makers
321	ConferMEDIrvine · 3 sites	-	69	75	Decision makers
322	UCI Health Pathology and Laboratory Services (Department of Pathology & Laboratory Science)Orange · 6 sites	Parent on file	69	75	Decision makers
323	UCI Health Pathology and Laboratory ServicesOrange · 3 sites	Parent on file	69	73	Decision makers
324	I V Radiology Medical GroupBrawley · 44 sites	-	69	70	Decision makers
325	Carbon HealthOakland · 91 sites	Parent on file	68	540	Decision makers
326	Brain Health USAGardena · 33 sites	-	68	337	Decision makers
327	Mountain View Emergency Physicians Medical GroupUpland · 11 sites	-	68	135	Decision makers
328	One MedicalSan Francisco · 25 sites	Parent on file	68	118	Decision makers
329	VituityEmeryville · 7 sites	Parent on file	68	100	Decision makers
330	UCLA Orthopaedic SurgeryLos Angeles · 19 sites	Parent on file	68	83	Decision makers
331	Cal Med Physicians and SurgeonsColton · 4 sites	Parent on file	68	81	Decision makers
332	Yosemite Pathology & Precision PathologyModesto · 5 sites	Parent on file	68	73	Decision makers
333	Accelerated Urgent CareBakersfield · 27 sites	Parent on file	67	313	Decision makers
334	Omni Family HealthBakersfield · 55 sites	Parent on file	67	215	Decision makers
335	Salud Para La GenteWatsonville · 10 sites	Parent on file	67	130	Decision makers
336	Barton HealthSouth Lake Tahoe · 9 sites	Parent on file	67	85	Decision makers
337	Temecula Valley Hospitalist Medical Group IncTemecula · 9 sites	-	67	85	Decision makers
338	San Diego Imaging (SDI) Medical GroupCoronado · 26 sites	-	67	72	Decision makers
339	Mindful Health SolutionsEl Dorado Hills · 19 sites	Parent on file	66	119	Decision makers
340	UCLA Medical GroupLos Angeles · 37 sites	Parent on file	66	111	Decision makers
341	Indian Health Center of Santa Clara ValleySan Jose · 11 sites	Parent on file	66	103	Decision makers
342	Balboa NephrologySan Diego · 27 sites	Parent on file	66	91	Decision makers
343	Regents Of The University Of CaliforniaOrange · 13 sites	Parent on file	66	79	Decision makers
344	Newport Imaging CenterNewport Beach · 7 sites	-	66	75	Decision makers
345	Torrance Anesthesia Medical Group, Inc.Torrance · 7 sites	-	66	75	Decision makers
346	Cedars-Sinai Imaging Medical GroupWest Hollywood · 4 sites	Parent on file	66	69	Decision makers
347	Scripps Mercy Physician PartnersSan Diego · 9 sites	Parent on file	66	67	Decision makers
348	CareMore Medical GroupCerritos · 20 sites	Parent on file	65	230	Decision makers
349	UCLA HealthLos Angeles · 19 sites	Parent on file	65	167	Decision makers
350	InnercareEl Centro · 26 sites	Parent on file	65	148	Decision makers

Showing 301 to 350 of 10,378 medical groups in California

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

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