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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. Lori Walker, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 740-9355
Dr. Lorna Gaudiel, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Lubna Nazim
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 846-4312
Dr. Lucinda Leung, MD, PHD, MPH
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Luis Aparicio, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 357-6682
Dr. Lusine Soghbatyan
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 226-7556
Dr. Lyn Pestana, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Mabel Vasquez, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-5100
Dr. Madeleine Soderberg, MD
Los Angeles, CA · $24 in drug and device payments (2025) · (323) 226-8105
Dr. Madeline Treasure
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 206-6232
Dr. Madelyn Perez
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-1000
Dr. Maggie Ham, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 301-8707
Dr. Mahima Iyengar, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (424) 338-1470
Dr. Mahnoush Babaei, M.D
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (213) 699-7075
Dr. Mahnoush Jazzabi, M.D.
Los Angeles, CA · $340 in drug and device payments (2025) · (323) 343-3301
Dr. Maija Sanna, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 319-4377
Dr. Malcolm Taw, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Malena Law, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 458-2381
Dr. Mamie Dong, M.D.
Los Angeles, CA · $149 in drug and device payments (2025) · (310) 206-4083
Dr. Mana Khafaf, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 478-3711
Dr. Man-chun Chen, M.D.
Los Angeles, CA · $27 in drug and device payments (2025) · (213) 617-0777
Dr. Maneesh Bansal, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 478-1101
Dr. Maninder Kaler, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 267-9643
Dr. Mansour Benlevy, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 665-4230
Dr. Manvel Kondradzhyan, MD
Los Angeles, CA · $91 in drug and device payments (2025) · Telehealth · (323) 987-1362
Dr. Maralee Kanin
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 825-7922
Dr. Marc Horwitz
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-0074
Dr. Marcus Munoz
Los Angeles, CA · $117 in drug and device payments (2025) · (310) 206-6232
Dr. Margaret Chi, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (626) 236-2796
Dr. Margaret Ginoza, MD MPH
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-9111
Dr. Margaret Nathanson, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-8373
Dr. Margaret Park, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (415) 596-4920
Dr. Margaret Slack, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-7375
Dr. Margarita Ivanova
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-2324
Dr. Maria Elaine Pira, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 846-4222
Dr. Maria Gorgona, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-5100
Dr. Maria Hamilton, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 783-4011
Dr. Maria Han, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 206-6232
Dr. Maria Pagan Mendez, MD
Los Angeles, CA · $181 in drug and device payments (2025) · Telehealth · (310) 825-7922
Dr. Maria Romanova
Los Angeles, CA · $187 in drug and device payments (2025) · (310) 478-3711
Dr. Marie Montoya, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4892
Dr. Marina Kovalevsky, M.D.
Los Angeles, CA · $1,958 in drug and device payments (2025) · (323) 650-3335
Dr. Mario Jaramillo, MD
Los Angeles, CA · $335 in drug and device payments (2025) · (760) 567-7577
Dr. Marissa Fox, MD
Los Angeles, CA · $1,720 in drug and device payments (2025) · (323) 215-1725
Dr. Mariya Kalashnikova, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 409-3642
Dr. Marizabel Patel, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Mark Ackerman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-5555
Dr. Mark Aminzadeh, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (424) 522-7100
Dr. Mark Davidson, M.D.
Los Angeles, CA · $2,277 in drug and device payments (2025) · Telehealth · (310) 855-0222
Dr. Mark Goleski, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 644-3888

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.