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. Vernon Shull, MD
Ridgecrest, CA · No drug or device payments recorded (2025) · (760) 446-5128
Dr. Robert Lynch, M.D.
Riverbank, CA · $1,606 in drug and device payments (2025) · (209) 869-7400
Dr. Adam Robarge, MD
Riverside, CA · $28 in drug and device payments (2025) · (951) 526-8985
Dr. Adam Vergara
Riverside, CA · No drug or device payments recorded (2025) · (951) 697-5490
Dr. Ahmad Saleh, D.O.
Riverside, CA · $31 in drug and device payments (2025) · Telehealth · (951) 827-1012
Dr. Ahmed Kheiter, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 688-2211
Dr. Albert Li, MD
Riverside, CA · $43 in drug and device payments (2025) · Telehealth · (951) 782-3614
Dr. Ali Mahdi
Riverside, CA · $76 in drug and device payments (2025) · (951) 781-3672
Dr. Amanjot Rangi, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Ameera Khan, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Amir Asifuddin, M.D.
Riverside, CA · $464 in drug and device payments (2025) · (951) 353-4226
Dr. Amit Gir, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Amy Lee, MD, FACE, FACGS
Riverside, CA · No drug or device payments recorded (2025) · (951) 343-3388
Dr. Andrew Corr, MD
Riverside, CA · $98 in drug and device payments (2025) · Telehealth · (951) 782-3613
Dr. Andrew Hwang
Riverside, CA · $13 in drug and device payments (2025) · (951) 788-3000
Dr. Andrew Yang, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Andro Sharobiem, M.D.
Riverside, CA · $1,966 in drug and device payments (2025) · (951) 788-0008
Dr. Angela Martin, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Anita Andra, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 351-1346
Dr. Anita Phatak, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Apoorva Ananth, MD
Riverside, CA · $122 in drug and device payments (2025) · (510) 752-1933
Dr. Arthur Kevin Amador, DO
Riverside, CA · No drug or device payments recorded (2025) · (833) 574-2273
Dr. Audrey Tran, DO
Riverside, CA · $125 in drug and device payments (2025) · (951) 786-5350
Dr. Bahaa Girgis, M.D.
Riverside, CA · $140 in drug and device payments (2025) · Telehealth · (951) 352-2421
Dr. Baker Hillawy, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Benjamin Chung, MD
Riverside, CA · $82 in drug and device payments (2025) · (951) 321-0100
Dr. Birju Shah, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Brian Bui
Riverside, CA · No drug or device payments recorded (2025) · (951) 788-3000
Dr. Brian Wong, MD
Riverside, CA · $49 in drug and device payments (2025) · (909) 353-2000
Dr. Caleb Bonds
Riverside, CA · $23 in drug and device payments (2025) · (909) 475-2612
Dr. Caroline Bakhit, DO
Riverside, CA · $133 in drug and device payments (2025) · (951) 602-4382
Dr. Cary Yee, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 536-5123
Dr. Catherine Hoang, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 683-6370
Dr. Catherine Larson, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 782-3617
Dr. Ceyda Zarifi, DO
Riverside, CA · No drug or device payments recorded (2025) · (951) 353-2000
Dr. Chi Zheng, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 697-5427
Dr. Christopher Swanson, M.D.
Riverside, CA · $69,337 in drug and device payments (2025) · (951) 697-5405
Dr. Clara Liu, DO
Riverside, CA · $654 in drug and device payments (2025) · (951) 788-3000
Dr. Daniel Pearce, D.O.
Riverside, CA · No drug or device payments recorded (2025) · (951) 284-6200
Dr. David Karp, MD
Riverside, CA · $32 in drug and device payments (2025) · (833) 574-2273
Dr. David Lim, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. David Thio, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 782-3619
Dr. David Wong, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Deborah Fung, M.D.
Riverside, CA · No drug or device payments recorded (2025) · (866) 984-7483
Dr. Derek Nguyen, MD
Riverside, CA · $1,244 in drug and device payments (2025) · Telehealth · (951) 683-6830
Dr. Dhara Patel, DO
Riverside, CA · $149 in drug and device payments (2025) · Telehealth · (951) 774-2881
Dr. Donald Blackman, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 683-6815
Dr. Douglas Eaton, MD
Riverside, CA · No drug or device payments recorded (2025) · (951) 697-5405
Dr. Edward Ro, MD
Riverside, CA · No drug or device payments recorded (2025) · (909) 353-2000
Dr. Edward Troncoso, MD
Riverside, CA · No drug or device payments recorded (2025) · Telehealth · (844) 827-8000

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.