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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. Haroon Zaidi
Sacramento, CA · No drug or device payments recorded (2025) · (916) 223-8297
Dr. Heather Tiska, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Heather Vierra, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-2737
Dr. Hector Guzman, D.O., MPH
Sacramento, CA · No drug or device payments recorded (2025) · (916) 497-3000
Dr. Heidi Horstman, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2813
Dr. Hekmat Nasiri, MD
Sacramento, CA · $150 in drug and device payments (2025) · (916) 734-3564
Dr. Helen Armstrong, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Hema Manickam, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-6988
Dr. Hershan Johl, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7506
Dr. Hillary Campbell, MD
Sacramento, CA · $85 in drug and device payments (2025) · (916) 973-5000
Dr. Himani Pandya, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5949
Dr. Hoi Trinh, MD
Sacramento, CA · $131 in drug and device payments (2025) · (916) 421-7720
Dr. Hoki Min, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Hung-anh Nguyen, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 391-0170
Dr. Hung Rogers, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 419-8851
Dr. Huong Bach, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2738
Dr. Ignacio Cortina Petrasic
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-2011
Dr. Ignacio Morales-carillo, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Igor Timofeyev, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Inderpal Biring, O.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 733-3777
Dr. Ingvild Lane, MD
Sacramento, CA · $1,528 in drug and device payments (2025) · Telehealth · (916) 733-3777
Dr. Irina Richards, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-8606
Dr. Jacob Alexander, M.D.
Sacramento, CA · $117 in drug and device payments (2025) · (916) 733-3777
Dr. Jacqueline Hsieh-wong
Sacramento, CA · $184 in drug and device payments (2025) · (916) 734-3772
Dr. Jaehwan Kim, M.D.
Sacramento, CA · $13 in drug and device payments (2025) · (916) 551-2621
Dr. Jaimie Lanzafame, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. James Abshire, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 733-3400
Dr. James Beckett, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-8797
Dr. James Jackson, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3333
Dr. James Liu, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3333
Dr. Jamie Metcalfe, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Janet Obrien, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 419-8380
Dr. Jane Tsai, M.D.
Sacramento, CA · $17 in drug and device payments (2025) · Telehealth · (916) 733-3400
Dr. Janice Rogers, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Janine Bera, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 313-8400
Dr. Jared Rosen
Sacramento, CA · $319 in drug and device payments (2025) · (916) 734-2011
Dr. Jasmeen Randhawa, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7777
Dr. Jason Chang, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7777
Dr. Jason Ferries, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Jason Flamm, MD
Sacramento, CA · $28 in drug and device payments (2025) · Telehealth · (916) 973-5000
Dr. Jason Gritti, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 688-2000
Dr. Jason Heath, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-2737
Dr. Jaspreet Kaur, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Jaspreet Tiwana, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 236-5800
Dr. Javid Mahmoodi, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 733-5090
Dr. Jaya Singh, MD
Sacramento, CA · $248 in drug and device payments (2025) · (916) 733-3777
Dr. Jayvani Thakur Garcia
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7506
Dr. Jennifer Draper, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7777
Dr. Jennifer Fan, M.D.
Sacramento, CA · $341 in drug and device payments (2025) · (914) 874-3389
Dr. Jennifer Miller, DO
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-3564

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.