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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. Hilda Riderer, D.O.
Marina Del Rey, CA · $30 in drug and device payments (2025) · (310) 823-8911
Dr. Irving Sobel, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · Telehealth · (310) 821-9800
Dr. Jeffrey Kurland, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · (310) 502-3444
Dr. Jonathan Rand, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · (310) 821-9800
Dr. Kambiz Farbakhsh, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · (310) 823-8911
Dr. Manvir Dhillon, MD
Marina Del Rey, CA · $1,133 in drug and device payments (2025) · (310) 823-8911
Dr. Riquaza Zavahir, M.D.
Marina Del Rey, CA · No drug or device payments recorded (2025) · (310) 656-1770
Dr. Salim Ahmed, M.D.
Marina Del Rey, CA · No drug or device payments recorded (2025) · (310) 827-3700
Dr. Steven Krems, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · Telehealth · (310) 306-6966
Dr. Supreet Chahal, MD
Marina Del Rey, CA · No drug or device payments recorded (2025) · Telehealth · (424) 314-0422
Dr. William Lang, M.D.
Marina Del Rey, CA · No drug or device payments recorded (2025) · Telehealth · (310) 536-8200
Dr. Leena Gupta, MD
Mariposa, CA · No drug or device payments recorded (2025) · (209) 966-3631
Dr. Abid Ahmed, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5000
Dr. Adam Buck, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5000
Dr. Alka Patel, M.D.-PH.D.
Martinez, CA · No drug or device payments recorded (2025) · (707) 437-1983
Dr. Brian O'neill, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-2018
Dr. Bryan Fong, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. David Besley, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. David Brody, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (415) 846-1067
Dr. David Chapman, MD
Martinez, CA · $135 in drug and device payments (2025) · (925) 372-2000
Dr. David Fields, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Ekaterina Malinovsky, MD
Martinez, CA · No drug or device payments recorded (2025) · Telehealth · (925) 372-1000
Dr. Emma Swan, MD
Martinez, CA · No drug or device payments recorded (2025) · (224) 430-3653
Dr. Eunice Liu, D.O.
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1669
Dr. F. Melewicz, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Gabriela Sullivan, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. George Chuang, DO
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. George Fong, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Gerald Bourne, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5973
Dr. Gerhard Heinrich, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (510) 715-9915
Dr. Indu Gupta, MD
Martinez, CA · $98 in drug and device payments (2025) · Telehealth · (925) 372-1000
Dr. Irina Pyrkova, M.D.
Martinez, CA · $125 in drug and device payments (2025) · (925) 212-4286
Dr. Jeremy Fish, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Jerry Yang, MD
Martinez, CA · $412 in drug and device payments (2025) · Telehealth · (925) 372-1000
Dr. Johanna Sharpe, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Keith White
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Kenton Chung, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Lauren Choi, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (925) 229-7756
Dr. Malini Shah, MD
Martinez, CA · No drug or device payments recorded (2025) · Telehealth · (925) 372-1000
Dr. Mark Vanhandel
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Mark Wille
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Martin Bauman
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Michael Weaver, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Nancy Lazarus, M.D.
Martinez, CA · No drug or device payments recorded (2025) · (707) 437-1800
Dr. Neeraja Maramreddy, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Nusrat Chaudhry, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5200
Dr. Olga Likhacheva, MD
Martinez, CA · No drug or device payments recorded (2025) · (925) 372-1000
Dr. Oliver Graham
Martinez, CA · No drug or device payments recorded (2025) · (925) 370-5110
Dr. Poly Vela-victa, MD
Martinez, CA · No drug or device payments recorded (2025) · Telehealth · (925) 372-1000
Dr. Rama Yarlagadda, MD
Martinez, CA · No drug or device payments recorded (2025) · Telehealth · (925) 372-1000

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

Related

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.