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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. Maher Roman, MD, MBA
Riverside, CA · No drug or device payments recorded (2025) · (951) 275-8400
Dr. Mai Le, DO
Riverside, CA · $50 in drug and device payments (2025) · (909) 558-7263
Dr. Mangala Shaker, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 781-4645
Dr. Manvir Wadhwa, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Margaret Song, MD
Riverside, CA · $44 in drug and device payments (2025) · Telehealth · (951) 697-5420
Dr. Mariam Hanna, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Marjorie Wimmer, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 697-5414
Dr. Mark Allison, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-8332
Dr. Matthew Schrader, D.O.
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3638
Dr. Megan Modenos, DO
Riverside, CA · $192 in drug and device payments (2025) · Telehealth · (951) 788-3000
Dr. Melanchton Mangoba, M.D.
Riverside, CA · $140 in drug and device payments (2025) · (951) 686-3437
Dr. Melanie Crane, MD
Riverside, CA · $185 in drug and device payments (2025) · Telehealth · (951) 782-3878
Dr. Michael Sunnaa, MD
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Mina Mikhail, MD
Riverside, CA · $1,028 in drug and device payments (2025) · (951) 750-1090
Dr. Mohammad Kharazmi, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 521-2357
Dr. Monique Lu
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Mousa Matar, M.D.
Riverside, CA · $412 in drug and device payments (2025) · Telehealth · (951) 750-1090
Dr. Munib Francis, DO
Riverside, CA · $133 in drug and device payments (2025) · (714) 401-0731
Dr. Naila Khan, D.O.
Riverside, CA · No drug or device payments recorded (2025) · (951) 275-7685
Dr. Nathan Mahler, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Neharika Khurana, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3386
Dr. Nguyen Doan, M.D.
Riverside, CA · $250 in drug and device payments (2025) · (951) 827-7669
Dr. Nicholas Nguyen, MD
Riverside, CA · $22 in drug and device payments (2025) · (909) 353-2000
Dr. Nikita Shah, DO
Riverside, CA · No drug or device payments recorded (2025) · (833) 450-5967
Dr. Nora Zuhdi
Riverside, CA · $135 in drug and device payments (2025) · Telehealth · (951) 786-5350
Dr. Ook Kim, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 782-3849
Dr. Patricia Ibarra, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (866) 984-7483
Dr. Patrick Merrill, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Paul Salama, MD
Riverside, CA · No drug or device payments recorded (2025) · (844) 827-8000
Dr. Peter Liao, M.D.
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 782-3612
Dr. Phuong Tran, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Pravin Panchal, MD
Riverside, CA · $231 in drug and device payments (2025) · Telehealth · (951) 333-3662
Dr. Primala Dosanjh, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 697-5473
Dr. Rachel Chiang, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Rajiv Choudhary, M.D., MPH
Riverside, CA · $413 in drug and device payments (2025) · (951) 353-2000
Dr. Ravinder Kahlon, M.D.
Riverside, CA · $1,227 in drug and device payments (2025) · (951) 352-3937
Dr. Ricardo Lim, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (909) 353-2000
Dr. Richard Frankenstein, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 321-6335
Dr. Richard Magbual, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (909) 353-2000
Dr. Ricky Tang, MD
Riverside, CA · $143 in drug and device payments (2025) · Telehealth · (951) 782-3689
Dr. Rigoberto Tejeda Acevedo, M.D.
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (855) 505-7467
Dr. Roger Cheng, M.D.
Riverside, CA · $270 in drug and device payments (2025) · Telehealth · (951) 354-2500
Dr. Ronald Dulos, MD
Riverside, CA · $31 in drug and device payments (2025) · Telehealth · (951) 697-5422
Dr. Rossini Batino, MD
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Sabhyata Sharma
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Sami Soliman, M.D.
Riverside, CA · $26 in drug and device payments (2025) · (909) 576-4802
Dr. Sammy Badawi, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Sang Yim, MD
Riverside, CA · $165 in drug and device payments (2025) · (951) 683-6370
Dr. Sanu John, DO
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 788-3274
Dr. Sarah Chae, MD
Riverside, CA · $332 in drug and device payments (2025) · (951) 585-1800

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.