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, 901 to 950
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
901	Vista Complete CareAuburn · 2 sites	-	5	15	Decision makers
902	Mikes Walk-In Clinic - HesperiaHesperia · 4 sites	Parent on file	5	14	Decision makers
903	MVP Medical GroupBurbank · 1 site	-	5	14	Decision makers
904	Uptimum Medical Group and IPA IncInglewood · 1 site	Parent on file	5	14	Decision makers
905	Ventura Urgent Care and Family PracticeVentura · 1 site	Parent on file	5	14	Decision makers
906	American Arthritis and Rheumatology Associates (AARA)Visalia · 9 sites	Parent on file	5	13	Decision makers
907	Epic Medical GroupSherman Oaks · 1 site	Parent on file	5	13	Decision makers
908	Equity HealthSan Francisco · 2 sites	Parent on file	5	13	Decision makers
909	Florence Western Medical ClinicLos Angeles · 3 sites	-	5	13	Decision makers
910	Geiss MEDOrange · 3 sites	Parent on file	5	13	Decision makers
911	PulmoCrit AssociatesNorthridge · 3 sites	-	5	13	Decision makers
912	Raincross Urgent CareRiverside · 1 site	-	5	13	Decision makers
913	Digestive Disease CenterBakersfield · 3 sites	-	5	12	Decision makers
914	East County Urgent CareEl Cajon · 2 sites	Parent on file	5	12	Decision makers
915	New Ananda Medical & Urgent CareEl Monte · 3 sites	Parent on file	5	12	Decision makers
916	Avita MDLos Altos · 5 sites	-	5	11	Decision makers
917	Critical Care Consultants of BurbankBurbank · 2 sites	-	5	11	Decision makers
918	Desert Kidney CareRancho Mirage · 1 site	-	5	11	Decision makers
919	First Health Medical CenterFresno · 1 site	Parent on file	5	11	Decision makers
920	Mobile Physician AssociatesBeverly Hills · 1 site	-	5	11	Decision makers
921	Raincross Medical GroupRiverside · 1 site	-	5	11	Decision makers
922	Digestive Disease Associates, Inc.San Diego · 1 site	-	5	10	Decision makers
923	Hassan Chahine MD IncLaguna Hills · 3 sites	-	5	10	Decision makers
924	Mangrove Medical GroupChico · 1 site	-	5	10	Decision makers
925	Mismo Dermatology & Wound CareSan Diego · 4 sites	-	5	10	Decision makers
926	My MD Multi specialty careOrange · 2 sites	-	5	10	Decision makers
927	Seva Medical GroupMurrieta · 2 sites	Parent on file	5	10	Decision makers
928	Shyam Bhaskar MD IncVisalia · 7 sites	-	5	10	Decision makers
929	Tustin Longevity CenterTustin · 1 site	-	5	10	Decision makers
930	Zugan Health Urgent CareSanta Barbara · 1 site	Parent on file	5	10	Decision makers
931	Achievable HealthCulver City · 1 site	Parent on file	5	9	Decision makers
932	Aspen Family Medicine & GeriatricsRancho Cucamonga · 3 sites	-	5	9	Decision makers
933	Cardiology of Southern CaliforniaNational City · 5 sites	-	5	9	Decision makers
934	CM Providers Medical GroupOrange · 2 sites	Parent on file	5	9	Decision makers
935	Hillcrest Internal MedicineSan Diego · 2 sites	-	5	9	Decision makers
936	Jackson Medical GroupSanta Barbara · 3 sites	-	5	9	Decision makers
937	Shasta Critical Care SpecialistsRedding · 2 sites	-	5	9	Decision makers
938	Sleep Health MDSanta Cruz · 2 sites	-	5	9	Decision makers
939	Southland Renal Medical GroupLakewood · 6 sites	-	5	9	Decision makers
940	Temecula Valley CardiologyMurrieta · 9 sites	-	5	9	Decision makers
941	The Cardiovascular CenterRedding · 1 site	-	5	9	Decision makers
942	The Heart Medical GroupVannuys · 4 sites	-	5	9	Decision makers
943	Wynn Medical CenterRosemead · 1 site	-	5	9	Decision makers
944	Affordable Medical Center & Urgent CareLos Angeles · 1 site	-	5	8	Decision makers
945	APLA HealthLos Angeles · 5 sites	Parent on file	5	8	Decision makers
946	Arash Alborzi, MD, Inc.Glendale · 1 site	-	5	8	Decision makers
947	By the Bay HealthLarkspur · 1 site	Parent on file	5	8	Decision makers
948	Cabrillo Center for Rheumatic DiseaseSan Diego · 4 sites	-	5	8	Decision makers
949	California Cardiovascular Care Medical GroupPasadena · 2 sites	-	5	8	Decision makers
950	Cardiovascular Medical AssociatesDowney · 3 sites	-	5	8	Decision makers

Showing 901 to 950 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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