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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. Chieh-yu Chen, MD
San Francisco, CA · $149 in drug and device payments (2025) · Telehealth · (415) 826-7575
Dr. Chih Yao Chang, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5942
Dr. Chitra Chandran, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-6913
Dr. Chloe Cattle
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Chongiin Kim
San Francisco, CA · $128 in drug and device payments (2025) · Telehealth · (415) 243-8666
Dr. Chris Keh, B.S., M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-2626
Dr. Christina Ghaly, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Christina Lee, MD
San Francisco, CA · $14 in drug and device payments (2025) · (415) 759-2300
Dr. Christina Pham, M.D.
San Francisco, CA · $210 in drug and device payments (2025) · (415) 830-3090
Dr. Christina Wang, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (628) 217-6500
Dr. Christine Ho, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8314
Dr. Christine Soran
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5164
Dr. Christopher Jaeger, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 334-2500
Dr. Christopher Lee, M.D.
San Francisco, CA · $310 in drug and device payments (2025) · (415) 206-5164
Dr. Christopher Ng, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 677-2388
Dr. Christopher Nguyen, MD
San Francisco, CA · $73 in drug and device payments (2025) · (415) 206-8317
Dr. Christopher Rios, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Christopher Sha, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-2129
Dr. Christopher Stoehr, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 215-9746
Dr. Christopher Wong, M.D.
San Francisco, CA · $109 in drug and device payments (2025) · Telehealth · (415) 923-3188
Dr. Chuk Kwan, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 398-5926
Dr. Cindy Lai, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300
Dr. Claire Greene, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 476-1000
Dr. Clare Siu, MD
San Francisco, CA · $80 in drug and device payments (2025) · (415) 876-2748
Dr. Claudio Gallina, M.D.
San Francisco, CA · $245 in drug and device payments (2025) · (415) 641-6612
Dr. Cleon Yee, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-5338
Dr. Clifford Lowell, M.D.
San Francisco, CA · $36,700 in drug and device payments (2025) · (415) 476-1560
Dr. Clifford Wong, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 398-4538
Dr. Colin Purmal
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1529
Dr. Conrad Leonik, MD, MPH
San Francisco, CA · $150 in drug and device payments (2025) · (415) 750-5942
Dr. Constance Wu, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1000
Dr. Cory Hussain, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 600-4900
Dr. Crawford Chung, M.D.
San Francisco, CA · $14 in drug and device payments (2025) · Telehealth · (415) 831-9788
Dr. Curtis Chan
San Francisco, CA · No drug or device payments recorded (2025) · (415) 647-8600
Dr. Cynthia Li, MD
San Francisco, CA · $132 in drug and device payments (2025) · (415) 206-5830
Dr. Cynthia Lin, MD
San Francisco, CA · $19 in drug and device payments (2025) · (415) 982-2400
Dr. Cynthia Point, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 379-2900
Dr. Cyrus Tamboli, DO
San Francisco, CA · $1,700 in drug and device payments (2025) · (415) 476-1000
Dr. Damond Ng, MD, MPH
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7999
Dr. Damon Francis, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8494
Dr. Damon Kwan, MD
San Francisco, CA · No drug or device payments recorded (2025) · (925) 634-9704
Dr. Dana Bui, M.D.
San Francisco, CA · $21 in drug and device payments (2025) · (415) 668-1000
Dr. Dana Mcclintock, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1079
Dr. Daniel Adelman, M.D.
San Francisco, CA · $2,656 in drug and device payments (2025) · (415) 353-2725
Dr. Daniela Maristany
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7900
Dr. Daniel Brissenden
San Francisco, CA · No drug or device payments recorded (2025) · (415) 567-6600
Dr. Daniel Butler, M.D.
San Francisco, CA · $239,707 in drug and device payments (2025) · (415) 353-7800
Dr. Daniel Chrobak
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-9894
Dr. Daniel Cox, M.D.
San Francisco, CA · $351 in drug and device payments (2025) · (415) 476-1528
Dr. Daniel Greenwood, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7300

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.