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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. Maneesh Penkar, M.D.
Torrance, CA · $45 in drug and device payments (2025) · Telehealth · (310) 373-1400
Dr. Manuel Hakimi, MD
Torrance, CA · $199 in drug and device payments (2025) · (310) 891-6623
Dr. Maria Ceja Rodriguez, MD
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4000
Dr. Mark Schwartz
Torrance, CA · $51 in drug and device payments (2025) · (310) 214-0811
Dr. Mark Thompson, M.D.
Torrance, CA · $178 in drug and device payments (2025) · (310) 370-1311
Dr. Marvin Chang, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Maryanne Amour, MD
Torrance, CA · $43 in drug and device payments (2025) · (424) 306-5571
Dr. Mary Doost, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 784-6954
Dr. Meena Oberoi, M.D.
Torrance, CA · $1,155 in drug and device payments (2025) · Telehealth · (310) 373-9980
Dr. Meiko Mayuzumi-kuriya, M.D.
Torrance, CA · $58 in drug and device payments (2025) · (310) 534-8200
Dr. Mengying Guo
Torrance, CA · $17 in drug and device payments (2025) · (310) 222-2401
Dr. Michael Bolaris, MD
Torrance, CA · $111 in drug and device payments (2025) · (310) 781-3636
Dr. Michael Borovay, M.D.
Torrance, CA · $20 in drug and device payments (2025) · Telehealth · (310) 792-4400
Dr. Michael Ibrahim, MD
Torrance, CA · $19 in drug and device payments (2025) · (310) 222-2345
Dr. Michael Pan, MD
Torrance, CA · $3,218 in drug and device payments (2025) · (424) 306-4320
Dr. Michelle Falcon, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 257-2598
Dr. Michelle Wong, MD
Torrance, CA · $125 in drug and device payments (2025) · (310) 214-0811
Dr. Mohammad Al-dmour, MD
Torrance, CA · $209 in drug and device payments (2025) · (424) 306-4000
Dr. Mohsen Basiri, MD
Torrance, CA · No drug or device payments recorded (2025) · (858) 295-0501
Dr. Moyeen Khaleeli, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 371-2110
Dr. Myra Deperalta, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-3891
Dr. Nam Lai, MD
Torrance, CA · $45 in drug and device payments (2025) · (310) 792-3914
Dr. Nancy Greep, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 791-6610
Dr. Natalie Zelta, M.D.
Torrance, CA · $503 in drug and device payments (2025) · Telehealth · (310) 378-2234
Dr. Natasha Dang, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 374-8191
Dr. Neda Rouhi Brojeni
Torrance, CA · $372 in drug and device payments (2025) · Telehealth · (310) 784-6300
Dr. Nguyen Tai, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 540-7676
Dr. Nicole Lawrence, M.D.
Torrance, CA · $23 in drug and device payments (2025) · Telehealth · (310) 378-6208
Dr. Nicole Nguyen, M.D.
Torrance, CA · $23 in drug and device payments (2025) · (310) 214-0811
Dr. Niloufar Ilani, M.D.
Torrance, CA · $28 in drug and device payments (2025) · (310) 371-4543
Dr. Nima Moghadam, MD
Torrance, CA · $305 in drug and device payments (2025) · Telehealth · (310) 378-2234
Dr. Norka Mercedes Quillatupa Valencia, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4000
Dr. Padma Naina Kasula, M.D
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 214-0811
Dr. Paola Ortiz, MD
Torrance, CA · $122 in drug and device payments (2025) · Telehealth · (310) 891-6623
Dr. Parivash Mohamadi, M.D.
Torrance, CA · $178 in drug and device payments (2025) · Telehealth · (310) 370-5694
Dr. Patricia Loo, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2409
Dr. Paul Brown, M.D.
Torrance, CA · $552 in drug and device payments (2025) · Telehealth · (310) 517-9006
Dr. Pei-yu Fu, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-5533
Dr. Peter Barrett, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-5101
Dr. Princess Gladys Bordador, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Priya Engel
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2345
Dr. Quynh Van King, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 781-2554
Dr. Rashmi Menon, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Riad Abdelkarim, M.D.
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (773) 691-8374
Dr. Richard Brach
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4000
Dr. Richard Butlig, MD
Torrance, CA · No drug or device payments recorded (2025) · Telehealth · (310) 373-7855
Dr. Richard Jin, MD
Torrance, CA · No drug or device payments recorded (2025) · (310) 784-6300
Dr. Ritu Kumar, M.D.
Torrance, CA · No drug or device payments recorded (2025) · (310) 222-2401
Dr. Robert Jenders
Torrance, CA · No drug or device payments recorded (2025) · (424) 306-4446
Dr. Ruben Mora, M.D.
Torrance, CA · $391 in drug and device payments (2025) · (310) 325-9110

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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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.