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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. Mai Magliocco, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-3954
Dr. Mai Sedki, M.D.
San Francisco, CA · $181 in drug and device payments (2025) · (415) 858-5000
Dr. Mai-sie Chan, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 956-6633
Dr. Maki Aoki, MD, ND
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7900
Dr. Malcolm John, MD
San Francisco, CA · $106 in drug and device payments (2025) · Telehealth · (415) 353-2119
Dr. Manisha Israni-jiang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 443-0017
Dr. Manisha Ojha, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 565-4612
Dr. Manish Varma, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 577-7378
Dr. Man Yin Chow, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 680-5202
Dr. Mara Cao, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 600-5400
Dr. Marc Shuman, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7171
Dr. Marcus Zachary, DO
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-6817
Dr. Margaret Fang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 502-1414
Dr. Margaret Tempero, MD
San Francisco, CA · $31,045 in drug and device payments (2025) · Telehealth · (415) 353-9888
Dr. Margaret Wheeler, MMD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8317
Dr. Margie Lim, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-8646
Dr. Margot Kushel, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8655
Dr. Maria Byron, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 476-5389
Dr. Maria Dall'era, MD
San Francisco, CA · $48,610 in drug and device payments (2025) · Telehealth · (415) 353-2497
Dr. Maria Magat, MD
San Francisco, CA · $18 in drug and device payments (2025) · (800) 377-3606
Dr. Marian Gold, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Maria Wamsley, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-4624
Dr. Maricar Pacquing, DO
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (201) 424-7130
Dr. Marilyn Kutzscher, M.D.
San Francisco, CA · $147 in drug and device payments (2025) · (415) 923-3560
Dr. Marion Peters, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2318
Dr. Marjorie Smith, M.D.
San Francisco, CA · $300 in drug and device payments (2025) · (415) 248-1050
Dr. Mark Berman, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 529-4099
Dr. Mark Chen, MD
San Francisco, CA · $52 in drug and device payments (2025) · (415) 833-2200
Dr. Mark Eisner, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2961
Dr. Mark Herman, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Mark Higgins, MD
San Francisco, CA · $4,181 in drug and device payments (2025) · Telehealth · (415) 600-4900
Dr. Mark Jacobson, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. Mark Looney, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-1116
Dr. Mark Marin, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 397-4295
Dr. Mark Oscherwitz, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 673-7600
Dr. Mark Pletcher, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7300
Dr. Mark Rubinstein, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2002
Dr. Mark Savant, M.D.
San Francisco, CA · $790 in drug and device payments (2025) · (415) 387-8031
Dr. Mark Sears, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 746-1940
Dr. Mark Smith, M.D., M.B.A.
San Francisco, CA · $22,571 in drug and device payments (2025) · (415) 206-2400
Dr. Marlene Martin, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Marta Kochanska, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2119
Dr. Martha Balabegians, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-6305
Dr. Martha Neighbor, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5753
Dr. Martin Albion, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-2343
Dr. Martin Liberman, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 447-5571
Dr. Martin Mass, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 593-1136
Dr. Martin Terplan, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 362-6398
Dr. Mary Beattie, MD, MAS
San Francisco, CA · No drug or device payments recorded (2025) · (415) 885-7788
Dr. Mary Cooke, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-4624

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.