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Internal Medicine Doctors in California

Data updated monthly · Last refresh October 2026

17,715 Internal Medicine providers practice in California, including 4,245 (24%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

17,715providers
4,245telehealth
Los Angelestop city

Internal Medicine by city in California

Choose a city to see providers there.

Internal Medicine in Los Angeles1,417 providers
Internal Medicine in San Francisco1,322 providers
Internal Medicine in San Diego970 providers
Internal Medicine in Sacramento602 providers
Internal Medicine in Oakland434 providers
Internal Medicine in San Jose433 providers
Internal Medicine in Stanford383 providers
Internal Medicine in Fresno339 providers
Internal Medicine in Torrance230 providers
Internal Medicine in Long Beach225 providers
Internal Medicine in Bakersfield210 providers
Internal Medicine in Loma Linda209 providers
Internal Medicine in Palo Alto189 providers
Internal Medicine in Anaheim188 providers
Internal Medicine in Orange188 providers
Internal Medicine in Riverside188 providers
Internal Medicine in Walnut Creek184 providers
Internal Medicine in Santa Monica170 providers
Internal Medicine in La Jolla161 providers
Internal Medicine in Roseville159 providers
Internal Medicine in Irvine155 providers
Internal Medicine in Beverly Hills152 providers
Internal Medicine in Santa Clara142 providers
Internal Medicine in Pasadena138 providers

Internal Medicine providers in California

Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Harpreet Rai, MD
Greenbrae, CA · $1,024 in drug and device payments (2025) · Telehealth · (415) 461-1780
Dr. Hima Satyavolu, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Janeen Smith, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Karen Eaton, P.A.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 448-1500
Dr. Kerry Davidson, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Mei-ling Fong, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 752-7141
Dr. Michael Nejad, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Michelle Bourke, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Pradeepa Selvakumar, MD
Greenbrae, CA · $39 in drug and device payments (2025) · Telehealth · (415) 925-7086
Dr. Priscilla Joy Navarro, MD
Greenbrae, CA · $51 in drug and device payments (2025) · (415) 925-7086
Dr. Suhaila Nawabi, MD
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7000
Dr. Susan Cumming, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7545
Dr. Susan Sun, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 925-7000
Dr. Teresa Black, M.D.
Greenbrae, CA · No drug or device payments recorded (2025) · (415) 448-1500
Dr. Thato Brumwell, M.D.
Greenbrae, CA · $29 in drug and device payments (2025) · (415) 925-7086
Dr. Nikom Udomphonkul, MD
Gridley, CA · No drug or device payments recorded (2025) · (530) 846-9035
Dr. Ramon Perez-egana Monge, M.D.
Gridley, CA · No drug or device payments recorded (2025) · Telehealth · (530) 846-9080
Dr. Satvir Dhillon, MD
Gridley, CA · No drug or device payments recorded (2025) · Telehealth · (530) 844-5655
Dr. Katherine Newcomb, M.D.
Groveland, CA · $19 in drug and device payments (2025) · (209) 962-4611
Dr. Walter Krampf, MD
Guerneville, CA · No drug or device payments recorded (2025) · (707) 869-2849
Dr. Anthony Chen, M.D.
Hacienda Heights, CA · $19 in drug and device payments (2025) · (626) 912-2682
Dr. David Aron, MD
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 968-0547
Dr. Edmund Foo, M.D.
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 913-2383
Dr. Hung-chuen Yeung, M.D.
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 968-2442
Dr. Jaw-huei Chen, MD
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 964-2880
Dr. Ray Hsiao, MD
Hacienda Heights, CA · $2,437 in drug and device payments (2025) · Telehealth · (626) 854-7866
Dr. Ron Gu, MD
Hacienda Heights, CA · $347 in drug and device payments (2025) · (626) 964-2880
Dr. Show Shan Cherng, M.D.
Hacienda Heights, CA · No drug or device payments recorded (2025) · (626) 913-3661
Dr. Wendy Gu, M.D.
Hacienda Heights, CA · $1,648 in drug and device payments (2025) · Telehealth · (626) 964-2880
Dr. William Tzeng, MD
Hacienda Heights, CA · $1,226 in drug and device payments (2025) · Telehealth · (626) 965-8202
Dr. Bernadette Mckell, D.O.
Half Moon Bay, CA · $129 in drug and device payments (2025) · Telehealth · (650) 276-0170
Dr. Jonathan Urena, MD
Half Moon Bay, CA · No drug or device payments recorded (2025) · (650) 307-4953
Dr. Asela Wickremasinghe, M.D.
Hanford, CA · $1,392 in drug and device payments (2025) · Telehealth · (559) 410-8404
Dr. Carlos Santivanez, M.D.
Hanford, CA · $2,663 in drug and device payments (2025) · Telehealth · (559) 582-9061
Dr. David Glossbrenner, MD
Hanford, CA · No drug or device payments recorded (2025) · (559) 240-1660
Dr. James Kuo, D.O.
Hanford, CA · No drug or device payments recorded (2025) · (559) 582-9000
Dr. John Gavini, M.D.
Hanford, CA · $1,237 in drug and device payments (2025) · Telehealth · (559) 583-4503
Dr. Joyce Ho, M.D.
Hanford, CA · No drug or device payments recorded (2025) · (559) 582-9000
Dr. Muhammad Hassan
Hanford, CA · No drug or device payments recorded (2025) · (559) 582-9000
Dr. Neelima Gondi, M.D.
Hanford, CA · No drug or device payments recorded (2025) · (559) 816-3754
Dr. Robert Woods, M.D.
Hanford, CA · No drug or device payments recorded (2025) · (559) 583-4500
Dr. Sudesh Nagavalli, MD
Hanford, CA · $1,143 in drug and device payments (2025) · Telehealth · (559) 583-4503
Dr. Sukhvir Singh, MD
Hanford, CA · $51 in drug and device payments (2025) · (559) 582-9000
Dr. Susan Locke, M.D.
Hanford, CA · $232 in drug and device payments (2025) · Telehealth · (559) 583-4560
Dr. Tarlan Moinizandi, M.D.
Hanford, CA · No drug or device payments recorded (2025) · (559) 585-5010
Dr. Ada Onyeagocha, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Akiko Kimura, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Alfredo Ok, M.D.
Harbor City, CA · No drug or device payments recorded (2025) · (424) 328-2187
Dr. Allen Rosen, MD
Harbor City, CA · No drug or device payments recorded (2025) · (310) 325-5111
Dr. Amy Wang, M.D.
Harbor City, CA · $21 in drug and device payments (2025) · Telehealth · (310) 325-5111

Conditions Internal Medicine providers in California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Internal Medicine providers are in California?

There are 17,715 Internal Medicine providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Internal Medicine providers in California offer telehealth?

Yes. 4,245 of the 17,715 Internal Medicine providers in California (about 24%) report offering telehealth services in CMS data.

Which cities in California have the most Internal Medicine providers?

Los Angeles (1,417), San Francisco (1,322), San Diego (970) have the highest concentration of Internal Medicine providers in California.

How many Internal Medicine providers in California received drug or device company payments?

5,614 of 17,715 Internal Medicine providers in California (32%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in California treat?

Internal Medicine providers commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

Do most Internal Medicine Doctors in California work in independent practices or large health systems?

Among 10,847 Internal Medicine Doctors in California enrolled in Medicare, 20% bill through a solo or small practice with fewer than 10 clinicians, 12% through a mid-size group of 10 to 99, and 67% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Internal Medicine Doctors in California work at?

According to CMS facility affiliation records, the California hospitals where the most Internal Medicine Doctors hold privileges are Stanford Health Care in Stanford; UCSF Medical Center in San Francisco; Ronald Reagan UCLA Medical Center in Los Angeles.

Related reading on HealthcareDiscovery.AI

Internal Medicine in all 50 states Search all 17,715 in the directory Ask Zach for help choosing

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Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory. Are you a Internal Medicine in California? Get featured.