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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. Chris Shin, M.D.
Anaheim, CA · $403 in drug and device payments (2025) · Telehealth · (714) 577-2340
Dr. Christina Jones, MD
Anaheim, CA · $153 in drug and device payments (2025) · Telehealth · (714) 772-8282
Dr. Christine Ohikhuare, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 279-4103
Dr. Chuan Nguyen, M.D.
Anaheim, CA · $587 in drug and device payments (2025) · Telehealth · (714) 991-8650
Dr. Chung Hur, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 991-8650
Dr. Corazon Medina, M.D.
Anaheim, CA · $349 in drug and device payments (2025) · (714) 563-2114
Dr. Damanpreet Jamarai, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 772-8282
Dr. Dan Huynh, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. David Garcia, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. David Hwang, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 826-7330
Dr. David Lyon, DO
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. David Shieh, MD
Anaheim, CA · No drug or device payments recorded (2025) · Telehealth · (888) 988-2800
Dr. David Simon, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 826-1200
Dr. Debby Chou, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Deepthi Devagudi, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 827-3000
Dr. Dong Lu, MD
Anaheim, CA · No drug or device payments recorded (2025) · Telehealth · (888) 988-2800
Dr. Donna Nguyen, MD
Anaheim, CA · $125 in drug and device payments (2025) · Telehealth · (888) 988-2800
Dr. Edward Nepomuceno, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 279-5644
Dr. Edwin Mattson, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 995-1000
Dr. Elaheh Farshidi, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 995-1000
Dr. Elizabeth Cheng, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 501-7692
Dr. Eutiquio Gutierrez, DO
Anaheim, CA · $1,707 in drug and device payments (2025) · Telehealth · (714) 999-1465
Dr. Fariborz Shams, D.O.
Anaheim, CA · $9,347 in drug and device payments (2025) · Telehealth · (714) 995-7503
Dr. Francisco Gonda, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 956-5470
Dr. Gabriel Sanchez, DO
Anaheim, CA · $416 in drug and device payments (2025) · (714) 551-9720
Dr. Gautam Anugu, MD
Anaheim, CA · No drug or device payments recorded (2025) · (214) 277-4354
Dr. Grace Young, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 817-7878
Dr. Gurleen Jamarai, M.D
Anaheim, CA · No drug or device payments recorded (2025) · (714) 772-8282
Dr. Hani El Jammal
Anaheim, CA · No drug or device payments recorded (2025) · (714) 399-9222
Dr. Hari Reddy, M.D.
Anaheim, CA · $40 in drug and device payments (2025) · (310) 403-1411
Dr. Hassan Ragab, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 776-2100
Dr. Heather Yong, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 254-2747
Dr. Hooshang Javaheri, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 995-1000
Dr. Huy Pham, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 635-2922
Dr. Hyon Seo, MD
Anaheim, CA · $33 in drug and device payments (2025) · (888) 988-2800
Dr. Hyun Doo Lee, M.D.
Anaheim, CA · $33 in drug and device payments (2025) · (888) 988-2800
Dr. Ion Sima, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 776-8273
Dr. Jacquelyn Leung, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Jagminder Bhalla, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 956-3160
Dr. James Lozano, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Janet Schreiber, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 821-8250
Dr. Jason Jilk, MD
Anaheim, CA · No drug or device payments recorded (2025) · (714) 974-2900
Dr. Jayana Patel, MD
Anaheim, CA · $111 in drug and device payments (2025) · (888) 988-2800
Dr. Jay Jablow, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Jeffrey Shapiro, M.D.
Anaheim, CA · $471 in drug and device payments (2025) · (714) 780-5695
Dr. Jenny Risman, M.D., PH.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 644-2000
Dr. Joel Handler, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Joel Moradkhani, MD
Anaheim, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Joey Santos, M.D.
Anaheim, CA · $2,494 in drug and device payments (2025) · Telehealth · (714) 635-7127
Dr. Johana Rodriguez, M.D.
Anaheim, CA · No drug or device payments recorded (2025) · (714) 399-9222

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.