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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. Adekunle Shittu, M.D
Wasco, CA · No drug or device payments recorded (2025) · (661) 758-2263
Dr. Ashraf Youssef, M.D.
Wasco, CA · $109 in drug and device payments (2025) · (661) 758-8400
Dr. Bernard Ramos, M.D.
Wasco, CA · No drug or device payments recorded (2025) · (661) 758-8400
Dr. Soe Htay, M.D.
Wasco, CA · $29 in drug and device payments (2025) · (661) 758-8400
Dr. Yong Hwang, M.D.
Wasco, CA · No drug or device payments recorded (2025) · (661) 758-2449
Dr. Krishnamoorthi Krishnamoorthi, M.D.
Waterford, CA · $104 in drug and device payments (2025) · Telehealth · (209) 874-2321
Dr. Brendt Carlson, MD
Watsonville, CA · No drug or device payments recorded (2025) · (831) 761-7225
Dr. Elias Rodriguez, MD
Watsonville, CA · $29 in drug and device payments (2025) · (831) 722-4016
Dr. Jose Huerta-ibarra, M.D.
Watsonville, CA · $1,283 in drug and device payments (2025) · (831) 722-2010
Dr. Katherine Kenny, M.D.
Watsonville, CA · No drug or device payments recorded (2025) · (831) 722-2010
Dr. Mai-khanh Bui-duy, M.D.
Watsonville, CA · No drug or device payments recorded (2025) · (831) 728-0222
Dr. Omid Bakhtar, D.O.
Watsonville, CA · No drug or device payments recorded (2025) · Telehealth · (831) 768-6217
Dr. Vaal Rothman
Watsonville, CA · No drug or device payments recorded (2025) · (831) 458-5860
Dr. Jacqueline Delyaei, M.D.
Watsoville, CA · No drug or device payments recorded (2025) · (831) 722-1444
Dr. David Derose, MD
Weimar, CA · No drug or device payments recorded (2025) · (530) 637-4111
Dr. Dustin Varesko, MD
Weimar, CA · No drug or device payments recorded (2025) · (530) 637-4025
Dr. Spencer Freed
Weimar, CA · No drug or device payments recorded (2025) · (530) 637-4025
Dr. Amitabh Chauhan, M.D.
West Covina, CA · No drug or device payments recorded (2025) · (626) 960-8614
Dr. Anil Gupta, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 922-0533
Dr. Binh Tran-lei, D.O.
West Covina, CA · No drug or device payments recorded (2025) · (626) 475-2614
Dr. Dennis Datuin, DO
West Covina, CA · No drug or device payments recorded (2025) · (626) 732-8390
Dr. Forest Tennant, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 919-0064
Dr. Fu-cheng Chuang, M.D.
West Covina, CA · No drug or device payments recorded (2025) · (626) 732-8390
Dr. Hee Oh, M.D.
West Covina, CA · $400 in drug and device payments (2025) · Telehealth · (626) 962-2421
Dr. Henry Chang, D.O.
West Covina, CA · $1,462 in drug and device payments (2025) · (626) 581-0486
Dr. Jae Kim, M.D.
West Covina, CA · $202 in drug and device payments (2025) · (626) 917-1924
Dr. Jair Wong, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 962-9108
Dr. Jiandong Liu, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 676-0172
Dr. John Wang, M.D., PH.D.
West Covina, CA · $71 in drug and device payments (2025) · (626) 732-8390
Dr. Johny Cu, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 331-6411
Dr. Kyaw Lyn, MD
West Covina, CA · $1,656 in drug and device payments (2025) · Telehealth · (626) 960-1902
Dr. Lakshman Makandura, M.D
West Covina, CA · $464 in drug and device payments (2025) · (626) 338-8407
Dr. Lina Dela Cruz, MD
West Covina, CA · $571 in drug and device payments (2025) · (626) 800-1200
Dr. Meisam Fekri, M.D
West Covina, CA · $22 in drug and device payments (2025) · Telehealth · (626) 430-6826
Dr. Ping Lim, MD
West Covina, CA · No drug or device payments recorded (2025) · (626) 960-4994
Dr. Ruth Karunananthan, M.D.
West Covina, CA · $69 in drug and device payments (2025) · (626) 263-7010
Dr. Seung Sue Cua, MD
West Covina, CA · $207 in drug and device payments (2025) · (626) 960-4939
Dr. Tei Chen Wang, M.D.
West Covina, CA · No drug or device payments recorded (2025) · (626) 856-2226
Dr. Virgilio Soriano, M.D.
West Covina, CA · $286 in drug and device payments (2025) · Telehealth · (626) 810-1522
Dr. Ziad Dabuni, M.D.
West Covina, CA · No drug or device payments recorded (2025) · (626) 960-8614
Dr. Ann Shahwan, MD
West Hills, CA · $541 in drug and device payments (2025) · Telehealth · (818) 704-8988
Dr. Barbara Callahan, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 227-0070
Dr. Benjamin Yasharel, MD
West Hills, CA · $262 in drug and device payments (2025) · Telehealth · (818) 347-2921
Dr. Bruce Jacobson, M.D.
West Hills, CA · $1,708 in drug and device payments (2025) · Telehealth · (818) 347-3239
Dr. Caleb Hirsch, MD
West Hills, CA · No drug or device payments recorded (2025) · (818) 676-4802
Dr. Christopher Hage, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 702-9962
Dr. Gary Nudell, MD
West Hills, CA · $624 in drug and device payments (2025) · (818) 676-4806
Dr. Golnaz Saedi, M.D.
West Hills, CA · No drug or device payments recorded (2025) · (818) 888-7090
Dr. Harry Rosen, M.D.
West Hills, CA · $170 in drug and device payments (2025) · (818) 612-8301
Dr. Jeffrey London, MD
West Hills, CA · $21 in drug and device payments (2025) · (818) 347-2921

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

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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.