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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. Steven Chan, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Steven Fugaro, M.D.
San Francisco, CA · $30 in drug and device payments (2025) · (415) 694-7500
Dr. Steven Hays, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-2961
Dr. Steven Katznelson, M.D.
San Francisco, CA · $120 in drug and device payments (2025) · Telehealth · (415) 923-6501
Dr. Steven Lam, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Steven Schroeder, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 502-1881
Dr. Steven Thompson, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-4539
Dr. Stewart Wong, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-3034
Dr. Stuart Malcolm, M.D.
San Francisco, CA · $210 in drug and device payments (2025) · (408) 508-4163
Dr. Suil Kim, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2961
Dr. Sujatha Sankaran, M.D
San Francisco, CA · No drug or device payments recorded (2025) · (415) 771-4361
Dr. Sumana Kesh, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-9879
Dr. Sumant Ranji, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 514-9256
Dr. Sunah Oh, D.O.
San Francisco, CA · No drug or device payments recorded (2025) · (800) 997-6196
Dr. Sundari Mase, MD MPH
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8314
Dr. Suneil Koliwad, M.D., PH.D.
San Francisco, CA · $5,313 in drug and device payments (2025) · Telehealth · (415) 206-3828
Dr. Sunita Mutha, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300
Dr. Supriya Bhat, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 593-1136
Dr. Susan Buchbinder, MD
San Francisco, CA · $3,564 in drug and device payments (2025) · (628) 217-7479
Dr. Susan Coffey, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4082
Dr. Susan Mayo, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (800) 997-6196
Dr. Susan Nguyen, MD
San Francisco, CA · $176 in drug and device payments (2025) · (650) 455-1363
Dr. Susan Rosen, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1281
Dr. Susan Young, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Sylvestre Quevedo, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7700
Dr. Tamara Sanchez Ortiz, MD-MPH
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8494
Dr. Tammy Lai, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 309-0328
Dr. Tanya Majumder, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 355-7555
Dr. Ted Li, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Teresa Cheng, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Terrie Mendelson, M.D.
San Francisco, CA · $172 in drug and device payments (2025) · Telehealth · (415) 750-5781
Dr. Tessa Kaplan
San Francisco, CA · No drug or device payments recorded (2025) · (562) 706-1617
Dr. Theodore Peng, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Theresa Kemnitz, D.O.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 978-6074
Dr. Therese Chan Tack, D.O
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 294-1462
Dr. Thinn Khaing, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Thoby Lawrence, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Thomas Bersot, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-4615
Dr. Thomas Bodenheimer, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8651
Dr. Thomas Martin, MD
San Francisco, CA · $17,016 in drug and device payments (2025) · Telehealth · (415) 353-2421
Dr. Tiantian Qin
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7900
Dr. Tiffany Kenison, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 648-3022
Dr. Tillman Pearce, MD
San Francisco, CA · No drug or device payments recorded (2025) · (650) 491-4956
Dr. Timothy Dyster, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 514-4764
Dr. Tina Binazir, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (855) 527-1850
Dr. Tin Ngo, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Toby Dyner, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 621-4188
Dr. Todd Pope, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Toni Brayer, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-6510
Dr. Tracy Minichiello, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 502-1413

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.