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, 401 to 450
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
401	Adventist Health Mendocino CoastFort Bragg · 3 sites	Parent on file	56	74	Decision makers
402	Pueblo Radiology Medical GroupSanta Barbara · 49 sites	-	56	60	Decision makers
403	Emergent Medical Associates (EMA)La Palma · 5 sites	Parent on file	56	58	Decision makers
404	Newport Emergency Medical GroupNewport Beach · 8 sites	Parent on file	55	87	Decision makers
405	South Coast Emergency Medical GroupSanta Barbara · 5 sites	Parent on file	55	79	Decision makers
406	Alvarado Emergency Medical AssociatesSan Diego · 6 sites	-	55	71	Decision makers
407	Emergent Medical AssociatesTarzana · 10 sites	Parent on file	55	71	Decision makers
408	Telehealth Medical GroupSanta Rosa · 20 sites	-	55	56	Decision makers
409	SacSolano Anesthesia Exchange Medical GroupSacramento · 4 sites	-	55	55	Decision makers
410	Boomerang HealthcareWalnut Creek · 20 sites	-	54	161	Decision makers
411	Petaluma Health CenterPetaluma · 6 sites	Parent on file	54	138	Decision makers
412	DAP HealthPalm Springs · 18 sites	Parent on file	54	133	Decision makers
413	Encinitas Emergency MedicineEncinitas · 6 sites	Parent on file	54	68	Decision makers
414	Lanterman Developmental CenterPomona · 10 sites	Parent on file	54	65	Decision makers
415	La Quality Care Anesthesia Consultants IncGlendale · 10 sites	-	54	55	Decision makers
416	Premiercare AnesthesiaFountain Valley · 9 sites	-	54	55	Decision makers
417	Unicare Community Health CenterOntario · 23 sites	Parent on file	53	160	Decision makers
418	Hoag Medical GroupIrvine · 20 sites	Parent on file	53	134	Decision makers
419	AMG Medical GroupAlhambra · 12 sites	Parent on file	53	93	Decision makers
420	VituityEmeryville · 12 sites	Parent on file	53	81	Decision makers
421	Pacific Emergency ProvidersSan Diego · 10 sites	Parent on file	53	77	Decision makers
422	Keck Medicine of USC Imaging Center in PasadenaPasadena · 4 sites	Parent on file	53	59	Decision makers
423	Advanced Medical ImagingFresno · 10 sites	Parent on file	53	57	Decision makers
424	Claremont Imaging AssociatesPomona · 7 sites	Parent on file	53	55	Decision makers
425	Pacifica Emergency Medical AssociatesEncino · 7 sites	-	53	53	Decision makers
426	GeriNet Medical AssociatesCosta Mesa · 7 sites	Parent on file	52	108	Decision makers
427	Emergency Medical Associates (EMA)Sherman Oaks · 7 sites	Parent on file	52	78	Decision makers
428	IM-FSR Inc.Chino Hills · 7 sites	-	52	70	Decision makers
429	UCR HealthRiverside · 5 sites	Parent on file	52	61	Decision makers
430	AristaMDSan Diego · 6 sites	Parent on file	52	54	Decision makers
431	Palms Imaging CenterOxnard · 10 sites	Parent on file	52	53	Decision makers
432	CommuniCare+OLENapa · 21 sites	Parent on file	51	143	Decision makers
433	Emergency Medical Management Associates (EMMA)Arcadia · 11 sites	Parent on file	51	88	Decision makers
434	Southland Emergency Medical AssociatesAnaheim · 7 sites	Parent on file	51	79	Decision makers
435	AmpleHealthCarmichael · 7 sites	-	51	61	Decision makers
436	Affiliated Pathologists Medical GroupRancho Dominguez · 16 sites	-	51	56	Decision makers
437	Valley Children's HealthcareMadera · 3 sites	Parent on file	51	54	Decision makers
438	Stanislaus County Behavioral Health and Recovery ServicesModesto · 29 sites	Parent on file	50	110	Decision makers
439	CHA Hollywood Presbyterian Medical CenterLos Angeles · 10 sites	Parent on file	50	93	Decision makers
440	Socal Anesthesia Solutions IncLos Angeles · 9 sites	Parent on file	50	75	Decision makers
441	Nephrology Associates Medical GroupRiverside · 13 sites	-	50	73	Decision makers
442	HALO Medical GroupIndian Wells · 22 sites	Parent on file	50	56	Decision makers
443	Mission Anesthesia ConsultantsMission Viejo · 10 sites	Parent on file	50	55	Decision makers
444	Central Valley Critical Care MedicineVisalia · 5 sites	-	50	54	Decision makers
445	El Camino HealthMountain View · 4 sites	Parent on file	50	54	Decision makers
446	Placerville Radiology Medical GroupPlacerville · 65 sites	Parent on file	50	51	Decision makers
447	San Diego Emergency Physicians IncSan Diego · 6 sites	-	50	51	Decision makers
448	Los Angeles Community Hospital at NorwalkNorwalk · 4 sites	Parent on file	50	50	Decision makers
449	Planned Parenthood Mar MonteSan Jose · 41 sites	Parent on file	49	223	Decision makers
450	Arrowhead OrthopaedicsRedlands · 12 sites	-	49	164	Decision makers

Showing 401 to 450 of 10,378 medical groups in California

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

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