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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. Ravi Bhatia, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (888) 750-0036
Dr. Reed Liang, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (909) 825-7084
Dr. Regan Douty, D.O.
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-3311
Dr. Robert Tarter, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-3311
Dr. Sahib Grewal, MD
Redlands, CA · $446 in drug and device payments (2025) · (909) 335-5500
Dr. Saliar Rustem, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-3311
Dr. Sammy Wong, MD
Redlands, CA · No drug or device payments recorded (2025) · (909) 557-3049
Dr. Shan Dhillon, DO
Redlands, CA · No drug or device payments recorded (2025) · (900) 908-4844
Dr. Sharon Strum, MD
Redlands, CA · $322 in drug and device payments (2025) · (909) 260-3163
Dr. Shazia Hyder, MD
Redlands, CA · $347 in drug and device payments (2025) · (909) 239-9824
Dr. The-huy Tran, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-3311
Dr. Trang Truong, M.D.
Redlands, CA · No drug or device payments recorded (2025) · (909) 793-3311
Dr. Victor Bassuk, MD
Redlands, CA · No drug or device payments recorded (2025) · (310) 740-7335
Dr. Afshin Ashfaei, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 318-9992
Dr. Ahmed Cahla, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 546-7676
Dr. Brian Gee, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Camela Ott, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 802-6177
Dr. Cecily Gallup, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 937-8555
Dr. Christopher Sun, MD
Redondo Beach, CA · $453 in drug and device payments (2025) · Telehealth · (310) 376-8816
Dr. Daniel Schmitz, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 937-8555
Dr. David Wallis, MD
Redondo Beach, CA · $195 in drug and device payments (2025) · Telehealth · (424) 437-4700
Dr. Deeya Kumar, DO
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (909) 635-8436
Dr. Diane Ferguson, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 792-3647
Dr. Gabriele Engelhardt, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 376-8816
Dr. George Alexander, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 316-1764
Dr. Glen Wishon, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Iman Afrooz, M.D
Redondo Beach, CA · $33 in drug and device payments (2025) · (310) 376-8816
Dr. Jaime La Charite, M.D., M.P.H.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 937-8555
Dr. John Armato, MD
Redondo Beach, CA · $339 in drug and device payments (2025) · Telehealth · (310) 374-7655
Dr. John Johnson, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 214-0811
Dr. Julie Delilly, M.D
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 376-8816
Dr. Juline Adelle Asamoah
Redondo Beach, CA · $15 in drug and device payments (2025) · Telehealth · (310) 937-8555
Dr. Peter Kaneshige, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 316-0811
Dr. Ronald Tsao, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 937-8555
Dr. Samina Khani, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Seema Johnston, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 376-8816
Dr. Sohail Davoudian, M.D.
Redondo Beach, CA · $537 in drug and device payments (2025) · Telehealth · (310) 214-1000
Dr. Susie Reyes, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Timothy O'connell, MD
Redondo Beach, CA · No drug or device payments recorded (2025) · Telehealth · (310) 316-0811
Dr. Tsuyoshi Okawa, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Weip Chen, M.D.
Redondo Beach, CA · No drug or device payments recorded (2025) · (310) 376-8816
Dr. Alamelu Lakshmanan, MD
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-2000
Dr. Alekhya Gaddam
Redwood City, CA · No drug or device payments recorded (2025) · (650) 367-5976
Dr. Alexander Loh
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-2000
Dr. Alexander Yu, MD
Redwood City, CA · No drug or device payments recorded (2025) · Telehealth · (650) 299-3671
Dr. Alison Pachynski, MD MPH
Redwood City, CA · No drug or device payments recorded (2025) · (650) 364-6010
Dr. Alvin Ting, MD
Redwood City, CA · No drug or device payments recorded (2025) · (650) 299-2000
Dr. Amy Chuang, MD
Redwood City, CA · No drug or device payments recorded (2025) · Telehealth · (650) 299-2015
Dr. Ansen Burr
Redwood City, CA · No drug or device payments recorded (2025) · (650) 723-5948
Dr. Barrett Bryan, MD
Redwood City, CA · No drug or device payments recorded (2025) · (650) 298-8774

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.