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, 651 to 700
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
651	East Bay Nephrology Medical GroupBerkeley · 7 sites	-	31	46	Decision makers
652	Corona Hospitalist Medical Group, Inc.Corona · 3 sites	-	31	41	Decision makers
653	Innovative Anesthesia Consultants, PCLa Mesa · 6 sites	-	31	40	Decision makers
654	SoCal HospitalistsNewport Coast · 2 sites	-	31	32	Decision makers
655	Orion Anesthesia Consultants, Inc.Murrieta · 4 sites	Parent on file	31	31	Decision makers
656	Ventana Anesthesia Associates IncMonterey · 2 sites	Parent on file	31	31	Decision makers
657	Santa Cruz Women's Health CenterSanta Cruz · 7 sites	Parent on file	30	91	Decision makers
658	Lumira HealthcareLivingston · 15 sites	Parent on file	30	84	Decision makers
659	One MedicalSan Francisco · 45 sites	Parent on file	30	81	Decision makers
660	Peach Tree HealthMarysville · 17 sites	Parent on file	30	75	Decision makers
661	Riverside Community HospitalRiverside · 3 sites	Parent on file	30	40	Decision makers
662	Loma Linda University PathologyLoma Linda · 3 sites	Parent on file	30	32	Decision makers
663	Life Medical PractitionersSan Diego · 3 sites	-	30	31	Decision makers
664	Sol RadiologyVictorville · 16 sites	Parent on file	30	30	Decision makers
665	Western Sierra Emergency Physicians Medical GroupLake Arrowhead · 3 sites	-	30	30	Decision makers
666	Special Service for Groups (SSG)Los Angeles · 31 sites	Parent on file	29	251	Decision makers
667	ONclick HealthcareWestlake Village · 25 sites	Parent on file	29	110	Decision makers
668	Western Sierra Medical ClinicGrass Valley · 10 sites	Parent on file	29	101	Decision makers
669	Antelope Valley Emergency Medical AssociatesLancaster · 4 sites	Parent on file	29	63	Decision makers
670	Axis Community HealthPleasanton · 4 sites	Parent on file	29	62	Decision makers
671	T.H.E. (To Help Everyone) Health and Wellness CentersLos Angeles · 5 sites	Parent on file	29	54	Decision makers
672	Modoc Medical Center (MMC)Alturas · 5 sites	Parent on file	29	52	Decision makers
673	Taylor Farms Family Health & Wellness CenterGonzales · 9 sites	Parent on file	29	43	Decision makers
674	Hospitalist Corporation of Inland EmpirePomona · 6 sites	Parent on file	29	40	Decision makers
675	La Jolla Observation MedicineLa Jolla · 3 sites	-	29	40	Decision makers
676	Wound MD PCPetaluma · 20 sites	-	29	37	Decision makers
677	Healdsburg HospitalHealdsburg · 5 sites	Parent on file	29	34	Decision makers
678	Landmark Anesthesia Medical GroupVictorville · 4 sites	Parent on file	29	33	Decision makers
679	Arrowhead Neurosurgical Medical GroupMoreno Valley · 3 sites	-	29	32	Decision makers
680	Inview ImagingAntioch · 9 sites	-	29	30	Decision makers
681	Crystal Anesthesiology IncOrange · 4 sites	Parent on file	29	29	Decision makers
682	Montage Orthopedics and Sports MedicineMonterey · 5 sites	Parent on file	28	110	Decision makers
683	Apollo Anesthesia AssociatesLos Angeles · 7 sites	Parent on file	28	59	Decision makers
684	Vallejo Emergency Physicians Medical GroupVallejo · 4 sites	-	28	58	Decision makers
685	Glendale Emergency MedGlendale · 7 sites	Parent on file	28	52	Decision makers
686	Plumas District HospitalQuincy · 2 sites	Parent on file	28	52	Decision makers
687	Big River Emergency Physicians IncHollister · 4 sites	-	28	51	Decision makers
688	Foothill Cardiology Medical GroupPasadena · 6 sites	-	28	46	Decision makers
689	Friends of Family Health CenterLa Habra · 7 sites	Parent on file	28	45	Decision makers
690	Saint John's Emergency Specialists Inc.Santa Monica · 5 sites	Parent on file	28	44	Decision makers
691	Newport Orthopedic InstituteNewport Beach · 4 sites	-	28	42	Decision makers
692	Ojai Valley Emergency PhysiciansOjai · 3 sites	Parent on file	28	30	Decision makers
693	Mark Twain Medical CenterSan Andreas · 4 sites	Parent on file	28	29	Decision makers
694	VeeOne HealthRoseville · 6 sites	-	28	29	Decision makers
695	Ventura OrthopedicsCamarillo · 9 sites	-	27	97	Decision makers
696	ROADS Community Clinic - ComptonCompton · 6 sites	Parent on file	27	75	Decision makers
697	UCI Head & NeckOrange · 3 sites	Parent on file	27	54	Decision makers
698	Valley Health TeamSan Joaquin · 16 sites	Parent on file	27	53	Decision makers
699	UCLA Neurosurgery AssociatesLos Angeles · 9 sites	Parent on file	27	47	Decision makers
700	Unified HealthValencia · 4 sites	-	27	42	Decision makers

Showing 651 to 700 of 10,378 medical groups in California

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

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