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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. Leigh Allen, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-9956
Dr. Leila Alpers, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 390-5820
Dr. Lesley Aiken, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Leslie Sheu, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-7900
Dr. Leslie Squires, MD
San Francisco, CA · $57 in drug and device payments (2025) · Telehealth · (415) 621-6886
Dr. Leslie Suen, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Leslie Wu, MD
San Francisco, CA · No drug or device payments recorded (2025) · (628) 206-8000
Dr. Lesslie Schofferman, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 331-8390
Dr. Lev Malevanchik
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Liam King, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Liang Liang
San Francisco, CA · $5,838 in drug and device payments (2025) · Telehealth · (415) 600-6000
Dr. Li-chi Hung
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-9182
Dr. Lily Chu
San Francisco, CA · No drug or device payments recorded (2025) · (415) 391-9686
Dr. Lily Huang, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-9087
Dr. Lily Kornbluth, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 353-7999
Dr. Linette Martinez, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 355-7473
Dr. Lin Wang, M.D., PH.D.
San Francisco, CA · $722 in drug and device payments (2025) · Telehealth · (415) 668-0160
Dr. Lisa Ashe, D.O.
San Francisco, CA · No drug or device payments recorded (2025) · (202) 269-7747
Dr. Lisa Blackwell, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2000
Dr. Lisa Capaldini, MD
San Francisco, CA · $64,631 in drug and device payments (2025) · (415) 861-3366
Dr. Lisa Chen, MD
San Francisco, CA · $165 in drug and device payments (2025) · (415) 206-8314
Dr. Lisa Gaynon
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-3954
Dr. Lisa Hoo, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 759-2300
Dr. Lisa Kasalajtis, MD
San Francisco, CA · $192 in drug and device payments (2025) · (415) 673-7600
Dr. Lisa Law, M.D.
San Francisco, CA · $238 in drug and device payments (2025) · Telehealth · (415) 986-0606
Dr. Lisa Ochoa-frongia, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-8494
Dr. Lisa Pratt, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 355-2238
Dr. Lisa Vail, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 353-8626
Dr. Lisa Winston, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 206-5438
Dr. Lisa Zacharewicz, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 972-2249
Dr. Lissette Lopez, MD
San Francisco, CA · $13 in drug and device payments (2025) · (415) 833-2000
Dr. Li Yu
San Francisco, CA · No drug or device payments recorded (2025) · (415) 668-1000
Dr. Loan Ngo, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 833-2200
Dr. Lochan Shah, MD
San Francisco, CA · $78 in drug and device payments (2025) · (415) 833-2000
Dr. Lois Vanderhagen, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (925) 634-9704
Dr. Loren Stolle, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 447-5571
Dr. Louisa Dresser, MD
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6257
Dr. Louis Cubba, MD
San Francisco, CA · $58,313 in drug and device payments (2025) · Telehealth · (415) 621-4228
Dr. Loyce Masae Kawamura, MD
San Francisco, CA · $16,831 in drug and device payments (2025) · (415) 206-8314
Dr. Luba Abascal, MD
San Francisco, CA · No drug or device payments recorded (2025) · Telehealth · (415) 833-2000
Dr. Lurit Bepo
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Lydia Alexander, M.D.
San Francisco, CA · $92,691 in drug and device payments (2025) · (415) 833-2000
Dr. Lydia Chan, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 750-5909
Dr. Lynnea Mills, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-7991
Dr. Lynn Flint, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 334-2500
Dr. Madeline Slater, MD
San Francisco, CA · $88 in drug and device payments (2025) · (415) 602-0413
Dr. Madhav Seshadri, M.D.
San Francisco, CA · $2,246 in drug and device payments (2025) · Telehealth · (415) 353-2421
Dr. Madison Malone, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 221-4810
Dr. Madison Wilson
San Francisco, CA · No drug or device payments recorded (2025) · (415) 476-1528
Dr. Maggie So, M.D.
San Francisco, CA · No drug or device payments recorded (2025) · (415) 600-6000

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.