HealthcareDiscovery.AI / Doctors / California / Internal Medicine

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. Ehssan Bdiwi, MD
Riverside, CA · No drug or device payments recorded (2025) · (614) 256-8099
Dr. Elizabeth Jacobs, MD
Riverside, CA · No drug or device payments recorded (2025) · (844) 827-8000
Dr. Eric Tran, DO
Riverside, CA · $353 in drug and device payments (2025) · (909) 475-2612
Dr. Estevan Torrez Andia, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 827-1012
Dr. Evan Basical
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (833) 574-2273
Dr. Fady Fayad, M.D.
Riverside, CA · $21 in drug and device payments (2025) · (313) 205-0909
Dr. Fiona Chai-tom, DO
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. George Skaf
Riverside, CA · $1,339 in drug and device payments (2025) · (951) 788-3000
Dr. Glen Riewe, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 782-3689
Dr. Gloria Carreon, M.D.
Riverside, CA · $99 in drug and device payments (2025) · Telehealth · (951) 782-6260
Dr. Hagit Hecht, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (909) 353-2000
Dr. Harneet Singh, MD
Riverside, CA · $101 in drug and device payments (2025) · (909) 353-2000
Dr. Humera Rana, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (800) 274-3893
Dr. Hung Pham, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (714) 553-5388
Dr. Hyung Koo Kim, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Iwan Ong, MD
Riverside, CA · No drug or device payments recorded (2025) · (866) 984-7483
Dr. Jaeyoung Yang, MD
Riverside, CA · No drug or device payments recorded (2025) · (888) 530-4415
Dr. Janardan Sivapalan
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-4226
Dr. Jason Couture, M.D.
Riverside, CA · $417 in drug and device payments (2025) · (951) 682-9911
Dr. Javier Barranco-trabi, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 475-2612
Dr. Jawdat Hantuli, D.O.
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Jeffrey Brand, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Jennifer Chang, M.D.
Riverside, CA · $25 in drug and device payments (2025) · (714) 869-7760
Dr. Jieun Ahn
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 782-3619
Dr. John Agtuca, D.O.
Riverside, CA · $355 in drug and device payments (2025) · Telehealth · (951) 781-3800
Dr. Joseph Alukal, M.D.
Riverside, CA · $288 in drug and device payments (2025) · (844) 827-8000
Dr. Joshua Pengson, M.D.
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (833) 574-2273
Dr. Jung-sup Lee, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Justin Curran
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3274
Dr. Kajal Gupta, M.D
Riverside, CA · No drug or device payments recorded (2025) · (855) 505-7467
Dr. Karen Roach, RNP
Riverside, CA · No drug or device payments recorded (2025) · (951) 782-3878
Dr. Karl Tanara, M.D.
Riverside, CA · $24 in drug and device payments (2025) · (951) 782-3715
Dr. Kathleen Fanning, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Kathleen Keating, D.O.
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 359-0660
Dr. Kazi Saleheen, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Kee Yang, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 248-9113
Dr. Ken Walls, PHD, MPAS, DO
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Kevin Pham, DO
Riverside, CA · No drug or device payments recorded (2025) · (951) 897-9896
Dr. Kevin Vu, MD
Riverside, CA · $19 in drug and device payments (2025) · Telehealth · (909) 353-2000
Dr. Kin Li
Riverside, CA · No drug or device payments recorded (2025) · (646) 255-0722
Dr. Komail Mujtaba Ali, MBBS
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Komal Kapoor, MD
Riverside, CA · $327 in drug and device payments (2025) · (844) 827-8000
Dr. Kristine Nicolas, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 955-5310
Dr. Kyi Myint, MBBS
Riverside, CA · No drug or device payments recorded (2025) · (951) 358-6000
Dr. Leah Hopkins, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 585-1800
Dr. Lesley Zendle, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Lihini Weerasinghe, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Liwen Han, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (951) 328-1850
Dr. Luan Truong, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Luis Munoz, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273

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

Related

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.