Updated October 2026

Largest primary care groups in California

Medical group directory
California
Primary care

Groups: 3,969
Internal Medicine groups: 1,835
Family Medicine groups: 1,169
Internal medicine specialists: 22,438
Family physicians: 4,605

There are 3,969 primary care groups in California with a Medicare PAC ID: 1,835 internal medicine, 1,169 family medicine, 619 nurse practitioner, 207 physician assistant and 138 general practice. The Permanente Medical Group, Inc. is the largest internal medicine group, with 3,018 internal medicine specialists, and MemorialCare Medical Group the largest family medicine group, with 247 family physicians.

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The Permanente Medical Group, Inc. is the largest primary care 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. 119 California groups have 100 or more physicians.

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Primary care groups in California, ranked by physicians, 3,351 to 3,400
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
3351	L.A. Endocrine Care, Inc.Long Beach · 1 site	-	1	2	Decision makers
3352	LA Digestive Health and WellnessLos Angeles · 1 site	-	1	2	Decision makers
3353	La Puente Valley Medical GroupLa Puente · 1 site	-	1	2	Decision makers
3354	La Verne Family Medical CenterLa Verne · 1 site	-	1	2	Decision makers
3355	Lakeview CardiologyUpland · 2 sites	-	1	2	Decision makers
3356	Laksmi Ananta IncVallejo · 2 sites	-	1	2	Decision makers
3357	Lalaine Tiu MD Inc.Fresno · 1 site	-	1	2	Decision makers
3358	Lincoln Family PracticeLincoln · 1 site	-	1	2	Decision makers
3359	Loc Dac Bui, M.D.Westminster · 1 site	-	1	2	Decision makers
3360	Loida V. Guevarra, M.D., Inc.Victorville · 1 site	-	1	2	Decision makers
3361	Loma Linda Cardiology Medical GroupLos Angeles · 2 sites	-	1	2	Decision makers
3362	Lomita Family Medical GroupSan Diego · 1 site	Parent on file	1	2	Decision makers
3363	Los Alamitos HemodialysisLos Alamitos · 1 site	Parent on file	1	2	Decision makers
3364	Los Angeles Gastroenterology GroupLos Angeles · 2 sites	-	1	2	Decision makers
3365	LT Duong, MDSanta Ana · 2 sites	-	1	2	Decision makers
3366	Luis M Blando MD IncCarson · 1 site	-	1	2	Decision makers
3367	Luis Mario Marquez, MD, Inc.San Diego · 2 sites	Parent on file	1	2	Decision makers
3368	Luminary MDMission Viejo · 1 site	-	1	2	Decision makers
3369	LUMNS CaliforniaRancho Cucamonga · 2 sites	-	1	2	Decision makers
3370	Maher A. A. Azer, Md, Inc.Los Alamitos · 1 site	Parent on file	1	2	Decision makers
3371	Makam MedicalAnaheim · 1 site	-	1	2	Decision makers
3372	Malaygiri Aparnath, Pulmonology & Critical Care MedicineFountain Valley · 1 site	-	1	2	Decision makers
3373	Manchester Urgent CareLos Angeles · 1 site	Parent on file	1	2	Decision makers
3374	Mann & Jones Medical GroupLong Beach · 1 site	Parent on file	1	2	Decision makers
3375	Manteca Urgent CareManteca · 2 sites	Parent on file	1	2	Decision makers
3376	Margaret Greenough, MDSan Luis Obispo · 2 sites	-	1	2	Decision makers
3377	Maria Geraldina Fuentes, MDChula Vista · 1 site	Parent on file	1	2	Decision makers
3378	Marin Pacific Medical GroupLos Angeles · 1 site	-	1	2	Decision makers
3379	Marina Kovalevsky, MDLos Angeles · 1 site	-	1	2	Decision makers
3380	Mark A Ward MD IncMorro Bay · 1 site	-	1	2	Decision makers
3381	Mark Barats, MDWest Hollywood · 1 site	-	1	2	Decision makers
3382	MD Care ProvidersHemet · 1 site	-	1	2	Decision makers
3383	ME Medical GroupMoreno Valley · 1 site	-	1	2	Decision makers
3384	Med Center Medical ClinicCarmichael · 2 sites	-	1	2	Decision makers
3385	Medex Medical GroupSan Gabriel · 1 site	Parent on file	1	2	Decision makers
3386	Medical Associates of BakersfieldBakersfield · 1 site	-	1	2	Decision makers
3387	Medtriq Treatment ServicesDanville · 1 site	-	1	2	Decision makers
3388	Mehrdad Kevin Ariani, MDNorthridge · 1 site	Parent on file	1	2	Decision makers
3389	MemorialCare Medical GroupLong Beach · 1 site	Parent on file	1	2	Decision makers
3390	Mensa Family Clinic IncGlendale · 1 site	-	1	2	Decision makers
3391	Merced Gastroenterology Medical OfficeMerced · 1 site	-	1	2	Decision makers
3392	Metamedicine IncSan Diego · 1 site	-	1	2	Decision makers
3393	Metropolitan Comprehensive Medical CenterSan Diego · 1 site	-	1	2	Decision makers
3394	Michael D. Cohen, M.D. Inc.Valencia · 1 site	Parent on file	1	2	Decision makers
3395	Mimi K. Sato-Re, MD Medical CorporationFolsom · 1 site	-	1	2	Decision makers
3396	Mission PsychiatricSolana Beach · 1 site	-	1	2	Decision makers
3397	Mitla CareBaldwin Park · 1 site	-	1	2	Decision makers
3398	Mobile Physicians Comfort Care, Inc - APMCValley Village · 1 site	-	1	2	Decision makers
3399	Mohsen Aljayeh MD IncRiverside · 1 site	-	1	2	Decision makers
3400	Mojdeh Talebian MD IncRedwood City · 1 site	Parent on file	1	2	Decision makers

Showing 3,351 to 3,400 of 3,969 primary care groups in California

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

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