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, 1,501 to 1,550
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
1501	Glendale Pathology AssociatesGlendale · 4 sites	Parent on file	9	9	Decision makers
1502	Holistic MedicalLos Angeles · 1 site	-	9	9	Decision makers
1503	Imperial Valley Radiation OncologyEl Centro · 4 sites	Parent on file	9	9	Decision makers
1504	Kern Valley HospitalMountain Mesa · 27 sites	Parent on file	9	9	Decision makers
1505	Miracle Mile Medical GroupLos Angeles · 1 site	-	9	9	Decision makers
1506	Newport Center Medical GroupNewport Beach · 2 sites	-	9	9	Decision makers
1507	Newport Diagnostic CenterNewport Beach · 2 sites	Parent on file	9	9	Decision makers
1508	Orange County Dermatology and SurgeryHuntington Beach · 2 sites	-	9	9	Decision makers
1509	Pain Clinics of Central CaliforniaFresno · 2 sites	-	9	9	Decision makers
1510	PIH Health Family MedicineWhittier · 2 sites	Parent on file	9	9	Decision makers
1511	Retina Consultants of Orange CountyFullerton · 2 sites	-	9	9	Decision makers
1512	San Joaquin Kidney Clinic, Inc.Stockton · 2 sites	-	9	9	Decision makers
1513	SMG Medical Practice GroupLos Angeles · 4 sites	-	9	9	Decision makers
1514	South Coast Retina CenterLong Beach · 4 sites	-	9	9	Decision makers
1515	Tower Nephrology Medical GroupBeverly Hills · 2 sites	-	9	9	Decision makers
1516	Vesta TeleradiologyGlendale · 53 sites	Parent on file	9	9	Decision makers
1517	West Coast RetinaSan Francisco · 4 sites	-	9	9	Decision makers
1518	Westside Internal MedicineSanta Monica · 1 site	-	9	9	Decision makers
1519	Westside Pain ManagementHuntington Beach · 3 sites	-	9	9	Decision makers
1520	Win RetinaArcadia · 3 sites	-	9	9	Decision makers
1521	X-Ray Medical Group, Inc.La Mesa · 7 sites	Parent on file	9	9	Decision makers
1522	Molina Medical CentersLong Beach · 18 sites	Parent on file	8	280	Decision makers
1523	North American Mental Health ServicesRedding · 11 sites	-	8	107	Decision makers
1524	Advanced Psychiatry AssociatesFolsom · 3 sites	-	8	104	Decision makers
1525	Headlight HealthSan Diego · 6 sites	Parent on file	8	76	Decision makers
1526	AFC Urgent Care San DiegoChula Vista · 8 sites	Parent on file	8	65	Decision makers
1527	Omni Anesthesia Associates IncFresno · 12 sites	Parent on file	8	51	Decision makers
1528	Hill Country Community ClinicRound Mountain · 8 sites	Parent on file	8	42	Decision makers
1529	Northeastern Rural Health ClinicsSusanville · 3 sites	Parent on file	8	40	Decision makers
1530	Diablo West Physical Therapy & Sports MedicineMenlo Park · 4 sites	-	8	38	Decision makers
1531	Pulmonary Consultants and Wellness CenterInglewood · 6 sites	-	8	38	Decision makers
1532	Healthcare in ActionLong Beach · 1 site	Parent on file	8	37	Decision makers
1533	California Dermatology InstituteThousand Oaks · 9 sites	-	8	35	Decision makers
1534	Cordial Healthcare ProvidersGlendale · 2 sites	Parent on file	8	35	Decision makers
1535	Doctors On The GoRancho Cucamonga · 1 site	-	8	35	Decision makers
1536	The Mobile DrsGlendale · 3 sites	Parent on file	8	35	Decision makers
1537	Vanguard Medical CorporationShafter · 7 sites	-	8	35	Decision makers
1538	Marin City Health & Wellness CenterSausalito · 3 sites	Parent on file	8	33	Decision makers
1539	Pain Management SpecialistsSan Luis Obispo · 5 sites	-	8	33	Decision makers
1540	Siyan ClinicalSanta Rosa · 1 site	-	8	33	Decision makers
1541	CityHealth Urgent CareSan Leandro · 3 sites	Parent on file	8	32	Decision makers
1542	Montclair Community Health CenterMontclair · 9 sites	Parent on file	8	30	Decision makers
1543	Aria Anesthesia GroupIrvine · 5 sites	-	8	29	Decision makers
1544	Cucamonga Valley Medical GroupFontana · 5 sites	-	8	29	Decision makers
1545	Tri-Valley Orthopedic SpecialistsPleasanton · 5 sites	-	8	29	Decision makers
1546	Shasta Cascade Health CentersMccloud · 4 sites	Parent on file	8	27	Decision makers
1547	Torrey Pines Orthopaedics and Sports MedicineLa Jolla · 3 sites	-	8	26	Decision makers
1548	Mid-Valley Pulmonary Medical GroupSherman Oaks · 3 sites	-	8	25	Decision makers
1549	Morongo Basin Community Health CenterYucca Valley · 5 sites	Parent on file	8	25	Decision makers
1550	Universal Primary Care Medical GroupBakersfield · 3 sites	-	8	25	Decision makers

Showing 1,501 to 1,550 of 10,378 medical groups in California

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

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