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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. John Kane, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-9070
Dr. John Mendelson, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 474-7900
Dr. John Messinger
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8494
Dr. John Metcalfe, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-4679
Dr. John Pierce, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 826-2438
Dr. John Quatannens, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. John Selle, D.O.
San Francisco, CA · $219 in drug and device payments (2025) · Telehealth · (415) 379-6100
Dr. Johnson Wong, DO
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. John Teerlink, M.D.
San Francisco, CA · $60,473 in drug and device payments (2025) · (415) 750-2112
Dr. John Umekubo, MD
San Francisco, CA · $1,983 in drug and device payments (2025) · Telehealth · (415) 931-5182
Dr. John Wu, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 981-0303
Dr. John Yao, MD FACP
San Francisco, CA · No drug or device payments recorded (2025) · (415) 308-9278
Dr. Jonathan Chou, MD, PHD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (510) 386-5155
Dr. Jonathan Garber, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Jonathan Graf, MD
San Francisco, CA · $153 in drug and device payments (2025) · (415) 206-8189
Dr. Jonathan Nordlicht, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 600-0140
Dr. Jonathan Singer, MD
San Francisco, CA · $687 in drug and device payments (2025) · Telehealth · (415) 386-2195
Dr. Jon Levine, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2497
Dr. Joo-sock Yang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 563-0300
Dr. Jordan Shlain, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 830-3090
Dr. Joseph Leung, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-2000
Dr. Joseph Mccune, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8317
Dr. Joseph Pace, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-5093
Dr. Jose Rosas, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 695-7714
Dr. Joshua Adler, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-4624
Dr. Joshua Rassen
San Francisco, CA · No drug or device payments recorded (2025) · (415) 751-1446
Dr. Joyce Hansen, M.D.
San Francisco, CA · $50 in drug and device payments (2025) · Telehealth · (415) 600-2402
Dr. Joy Victor, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-3458
Dr. Juan Larach, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Judi Sierra, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-3303
Dr. Judith Walsh, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 885-7788
Dr. Judy Hsu, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Judy Liu, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 942-2499
Dr. Julia Chambers
San Francisco, CA · No drug or device payments recorded (2025) · (415) 407-0087
Dr. Julia Janssen
San Francisco, CA · No drug or device payments recorded (2025) · (628) 217-6600
Dr. Juliana Macri
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Julia Peterson, DO
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000
Dr. Julie Gerberding, MD MPH
San Francisco, CA · $171,294 in drug and device payments (2025) · (415) 206-5438
Dr. Julieta Rodriguez, MD, MPH
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-4562
Dr. Juliet Stoltey, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-9363
Dr. Julio Pineda, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-2300
Dr. June Lee, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8314
Dr. Jurgita Pupeikiene, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5781
Dr. Justin Fong, M.D.
San Francisco, CA · $95 in drug and device payments (2025) · Telehealth · (415) 452-3155
Dr. Justin Quock, M.D., F.A.C.P.
San Francisco, CA · $133 in drug and device payments (2025) · (415) 398-5100
Dr. Justin Tien, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Kahee Jo, MD
San Francisco, CA · $22 in drug and device payments (2025) · (415) 600-6000
Dr. Kai Ng, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-2000
Dr. Ka Kam Chan, M.D.
San Francisco, CA · $20 in drug and device payments (2025) · (415) 921-8210
Dr. Kamaljit Sran, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-4982

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.