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, 3,501 to 3,550
#	Medical group	Parent organization	Physicians	HCPs	Decision makers
3501	Regenerative Medical GroupOrange · 1 site	-	1	2	Decision makers
3502	Reliance Hospice and Palliative CareCerritos · 1 site	Parent on file	1	2	Decision makers
3503	Reliant Pulmonary & Critical Care Medical GroupMonterey Park · 1 site	-	1	2	Decision makers
3504	Renal Medical GroupVisalia · 2 sites	Parent on file	1	2	Decision makers
3505	Renato V Mungcal MD IncLos Angeles · 1 site	-	1	2	Decision makers
3506	Renee Patel, M.D.Downey · 2 sites	-	1	2	Decision makers
3507	RenewMD CoastalCarlsbad · 1 site	-	1	2	Decision makers
3508	Reza Rohani, M.D.San Jose · 2 sites	-	1	2	Decision makers
3509	Rialto Community Medical ClinicRialto · 1 site	-	1	2	Decision makers
3510	Richard Uhler, DOTemecula · 1 site	-	1	2	Decision makers
3511	Ridgecrest Medical GroupValley Village · 1 site	-	1	2	Decision makers
3512	Ritchie Wong MD IncCarmichael · 1 site	Parent on file	1	2	Decision makers
3513	Robert H. Moon, MDChula Vista · 1 site	-	1	2	Decision makers
3514	Robert O Flores, MD Inc.San Fernando · 1 site	-	1	2	Decision makers
3515	Roc Medical ClinicStockton · 1 site	-	1	2	Decision makers
3516	Rommel Gonzales Medical Group IncLos Angeles · 1 site	Parent on file	1	2	Decision makers
3517	Roseville EndocrinologyRoseville · 1 site	-	1	2	Decision makers
3518	Ruiz Family PhysiciansLa Quinta · 1 site	-	1	2	Decision makers
3519	Ruiz Family PhysiciansLa Quinta · 2 sites	-	1	2	Decision makers
3520	Rume HealthIrvine · 2 sites	Parent on file	1	2	Decision makers
3521	RX WellnessLong Beach · 1 site	Parent on file	1	2	Decision makers
3522	Ryan B. Tran, MD, Inc.Mission Viejo · 1 site	-	1	2	Decision makers
3523	S J Byeon Medical GroupRowland Heights · 1 site	-	1	2	Decision makers
3524	Saadat SpineLos Angeles · 1 site	-	1	2	Decision makers
3525	Sam M. Khouri, MDFolsom · 1 site	-	1	2	Decision makers
3526	Samuel K. Lee M.D. Inc.Los Angeles · 1 site	-	1	2	Decision makers
3527	Samy A. Younis, MDIrvine · 1 site	Parent on file	1	2	Decision makers
3528	Samy Sharobeem, MDBeverly Hills · 1 site	-	1	2	Decision makers
3529	San Diego Internal MedicineSan Diego · 1 site	-	1	2	Decision makers
3530	San Marcos Medical ClinicNorwalk · 1 site	-	1	2	Decision makers
3531	San Ramon Urgent Care & ClinicLathrop · 1 site	Parent on file	1	2	Decision makers
3532	Sandra Wilson, MD Inc.Solvang · 1 site	-	1	2	Decision makers
3533	Sanjiv Goel, MD, Inc.Thousand Oaks · 1 site	-	1	2	Decision makers
3534	Santa Monica Sleep Disorders CenterLos Angeles · 2 sites	-	1	2	Decision makers
3535	Sarah S Olelewe MD Inc.Hawthorne · 1 site	-	1	2	Decision makers
3536	SAS Medical ManagementGlendale · 1 site	-	1	2	Decision makers
3537	Sayana Medical & Wellness CenterStudio City · 1 site	-	1	2	Decision makers
3538	Scott Stringer, M.D.Sacramento · 1 site	-	1	2	Decision makers
3539	SEP MedicalHuntington Park · 1 site	-	1	2	Decision makers
3540	Serenity Cancer CenterFresno · 1 site	-	1	2	Decision makers
3541	Serramonte Pulmonary Asthma and Sleep ClinicPinole · 1 site	Parent on file	1	2	Decision makers
3542	Seven Oaks Medical GroupBakersfield · 1 site	-	1	2	Decision makers
3543	Sharmel Kasten, DOClovis · 1 site	-	1	2	Decision makers
3544	Sharna Shachar, MDChula Vista · 1 site	Parent on file	1	2	Decision makers
3545	Sharp Community Medical GroupChula Vista · 2 sites	Parent on file	1	2	Decision makers
3546	Shehnaz Habib, MDPanorama City · 1 site	Parent on file	1	2	Decision makers
3547	Shine Health and WellnessPasadena · 1 site	-	1	2	Decision makers
3548	Shirish Patel, M.D., Inc.Lakewood · 2 sites	Parent on file	1	2	Decision makers
3549	Shiva Mohtashami MDMorgan Hill · 1 site	-	1	2	Decision makers
3550	Shu-Wing Chan MDSan Francisco · 1 site	Parent on file	1	2	Decision makers

Showing 3,501 to 3,550 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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