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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. Jennifer Zhou, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Jenny Chang, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Jenny Chen, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Jensine Ho, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 734-7777
Dr. Jessica Keane, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Jessie Medina
Sacramento, CA · $122 in drug and device payments (2025) · (916) 734-2737
Dr. Jestin Cheng, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Jillian Ahrens, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Jimmy Tam, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Joanna Finn, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 973-5000
Dr. Joaquin Roces, P.A.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3333
Dr. Jody Gordon, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-5044
Dr. Joel Tourtellotte, MD
Sacramento, CA · No drug or device payments recorded (2025) · (805) 304-2912
Dr. John Halloran, DO
Sacramento, CA · $17 in drug and device payments (2025) · (916) 733-3400
Dr. John Hernried, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. John Hosoume, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7777
Dr. John Howard, M.D.
Sacramento, CA · $72 in drug and device payments (2025) · (916) 733-3777
Dr. John Landefeld, MD
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 874-9670
Dr. John Macmillan, MD
Sacramento, CA · No drug or device payments recorded (2025) · (918) 734-7508
Dr. John Madigan, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 731-7965
Dr. John Morelli, M.D
Sacramento, CA · No drug or device payments recorded (2025) · (916) 679-3693
Dr. John Ning, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7506
Dr. Johnny Alvarez De La Cruz, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. John Perlegos
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Joi Barrett, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · Telehealth · (916) 733-8713
Dr. Jonathan Aron, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080
Dr. Jonathan Tran
Sacramento, CA · $388 in drug and device payments (2025) · (916) 734-2737
Dr. Jonathan Yin, M.D.
Sacramento, CA · $248 in drug and device payments (2025) · (916) 733-3777
Dr. Jorge Garcia, M.D.
Sacramento, CA · $81 in drug and device payments (2025) · (916) 734-2737
Dr. Jose Abad., MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 448-3976
Dr. Joseph An, MD
Sacramento, CA · No drug or device payments recorded (2025) · (167) 036-7569
Dr. Joseph Link, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Joseph Melendres, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-5290
Dr. Joseph Neely, MD, MPH
Sacramento, CA · $74 in drug and device payments (2025) · (916) 734-2737
Dr. Joseph Shemuel, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2737
Dr. Jose Zumba, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-2011
Dr. Joshua Grischkan
Sacramento, CA · No drug or device payments recorded (2025) · (424) 342-5918
Dr. Joshua White, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7506
Dr. Jothika Tamizharasu
Sacramento, CA · $376 in drug and device payments (2025) · (916) 734-2737
Dr. Joyce Leary, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-3730
Dr. Juan Moreno, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Juan Rubero, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 485-4175
Dr. Julian Espino, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Julianne Tondre
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Julie Sporrer, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 688-2000
Dr. Juliette Personius
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-8609
Dr. Julio Ramirez Siliezar, MD
Sacramento, CA · No drug or device payments recorded (2025) · (650) 922-6811
Dr. June Pham, MD
Sacramento, CA · No drug or device payments recorded (2025) · (916) 973-5000
Dr. Kai-ey Chen, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Kaity Lin, M.D.
Sacramento, CA · No drug or device payments recorded (2025) · (916) 734-7080

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.