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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. Mary Earp, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Mary Ellen Kleinhenz, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-2961
Dr. Mary Jean Stempien, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 334-1427
Dr. Mary Kemeny, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Mary Pearson, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8446
Dr. Mary Welter
San Francisco, CA · No drug or device payments recorded (2025) · (415) 885-3723
Dr. Mary Whooley, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-2093
Dr. Ma Sabai, M.D
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-2388
Dr. Matthew Bell, MD
San Francisco, CA · $1,190 in drug and device payments (2025) · (415) 600-6000
Dr. Matthew Dorsey, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5438
Dr. Matthew Hanson, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4990
Dr. Matthew Jeong, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2200
Dr. Matthew Murrill, MD PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Matthew Oertli
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Matthew Riley, D.O.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5909
Dr. Matthew Sakumoto
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 514-4539
Dr. Matthew Spinelli, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8000
Dr. Maxine Papadakis, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-2093
Dr. Maxwell Birger, MD
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Maya Dulay, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-2129
Dr. Mayuri Chandran, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. May Yau, M.D.
San Francisco, CA · $21 in drug and device payments (2025) · Telehealth · (415) 923-3179
Dr. Meera Ragavan, MD
San Francisco, CA · $2,060 in drug and device payments (2025) · (415) 833-3692
Dr. Meera Sreenivasan, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 503-9277
Dr. Megan Betancourt
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Meghan Jobson, MD, PHD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-2300
Dr. Meghan Murphy
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4562
Dr. Meghan O'brien, MD, MBE
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Meg Newman, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. Mehrdad Matloubian, MD
San Francisco, CA · $197 in drug and device payments (2025) · Telehealth · (415) 353-2497
Dr. Mei-lai Lucas, MD
San Francisco, CA · $59 in drug and device payments (2025) · (415) 752-7141
Dr. Mekhala Chandra
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-3954
Dr. Melinda Gu, M.D., PH D
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 514-6200
Dr. Melissa Bachhuber, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Melissa Chiang
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7900
Dr. Melissa Kwon, M.D.
San Francisco, CA · $26 in drug and device payments (2025) · Telehealth · (415) 600-0140
Dr. Melody Kim, MD
San Francisco, CA · $16 in drug and device payments (2025) · (415) 833-2850
Dr. Melvin Scheinman, M.D.
San Francisco, CA · $50,926 in drug and device payments (2025) · (415) 353-2554
Dr. Meredith Adamo
San Francisco, CA · $19 in drug and device payments (2025) · Telehealth · (415) 355-7400
Dr. Meredith Heller, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300
Dr. Merik Gross, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 885-7788
Dr. Merle Smith, M.D., PH.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 846-1442
Dr. Meshell Johnson, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2961
Dr. Mia Williams, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 514-8651
Dr. Michaela Glenn, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Michael Apolinario, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Michael Dauchot, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 218-3125
Dr. Michael German, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2350
Dr. Michael Holman, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Michael Humphreys, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4617

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.