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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. Vanessa Vinn, D.O.
Irvine, CA · No drug or device payments recorded (2025) · (949) 923-3200
Dr. Viet Nguyen, D.O.
Irvine, CA · $176 in drug and device payments (2025) · (855) 206-6764
Dr. Warren Hung, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 559-1496
Dr. Wei Wang, MD
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (330) 835-8559
Dr. William Chen, M.D.
Irvine, CA · $79 in drug and device payments (2025) · (949) 932-2514
Dr. William Tsai, M.D.
Irvine, CA · $81 in drug and device payments (2025) · Telehealth · (949) 955-0202
Dr. Xinmiao Yang, MD
Irvine, CA · No drug or device payments recorded (2025) · (949) 517-3000
Dr. Yeming Sun, M.D.
Irvine, CA · $125 in drug and device payments (2025) · (949) 552-6788
Dr. Yolanda Zhang, DO
Irvine, CA · No drug or device payments recorded (2025) · (855) 206-6764
Dr. Yunsan Huang, MD
Irvine, CA · No drug or device payments recorded (2025) · Telehealth · (949) 824-8600
Dr. Syed Saquib, M.D.
Irwindale, CA · No drug or device payments recorded (2025) · (626) 812-0366
Dr. Adrian Oribello, M.D.
Jackson, CA · No drug or device payments recorded (2025) · (707) 342-5760
Dr. Craig Hall, MD
Jackson, CA · No drug or device payments recorded (2025) · (209) 368-0560
Dr. Darrel Kerr, MD
Jackson, CA · No drug or device payments recorded (2025) · (209) 257-5900
Dr. Dennis Nousaine, M.D.
Jackson, CA · No drug or device payments recorded (2025) · (209) 257-5900
Dr. Gary Woodward, M.D.
Jackson, CA · No drug or device payments recorded (2025) · (209) 257-5900
Dr. Geraldine O'shea, DO
Jackson, CA · No drug or device payments recorded (2025) · Telehealth · (209) 257-1057
Dr. Hashim Chaudhry, DO
Jackson, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Latha Sunil Kumar, M.D
Jackson, CA · No drug or device payments recorded (2025) · (916) 733-3777
Dr. Michelle Roland, MD
Jackson, CA · No drug or device payments recorded (2025) · Telehealth · (209) 257-5900
Dr. Puneet Kaur, M.D.
Jackson, CA · No drug or device payments recorded (2025) · Telehealth · (209) 257-5900
Dr. Robert Hartmann, MD
Jackson, CA · No drug or device payments recorded (2025) · Telehealth · (209) 257-5900
Dr. Scott Heatley, M.D.
Jackson, CA · No drug or device payments recorded (2025) · Telehealth · (209) 257-5900
Dr. Stefan Zineski, M.D.
Jackson, CA · No drug or device payments recorded (2025) · (209) 257-5900
Dr. Steven Roche, M.D.
Janesville, CA · No drug or device payments recorded (2025) · (530) 253-3686
Dr. Wali Abawi, D.O.
Joshua Tree, CA · No drug or device payments recorded (2025) · (760) 366-3711
Dr. Amy Lynn Daguio, MD
Jurupa Valley, CA · No drug or device payments recorded (2025) · (951) 955-0840
Dr. Chris Bacchi, MD
Kenfield, CA · No drug or device payments recorded (2025) · (415) 461-1036
Dr. Aaron Park
Kentfield, CA · $22 in drug and device payments (2025) · (415) 456-9680
Dr. Bhawna Jain
Kentfield, CA · No drug or device payments recorded (2025) · (415) 485-3524
Dr. Curtis Roebken, MD
Kentfield, CA · No drug or device payments recorded (2025) · (415) 485-3505
Dr. Hector Perez, MD
Kentfield, CA · No drug or device payments recorded (2025) · (415) 465-4070
Dr. John Cranshaw, M.D.
Kentfield, CA · No drug or device payments recorded (2025) · (415) 456-9680
Dr. Karthikeyan Sitaraman, M.D
Kentfield, CA · No drug or device payments recorded (2025) · (415) 456-9680
Dr. Susan Waters, M.D.
Kentfield, CA · No drug or device payments recorded (2025) · (415) 485-3524
Dr. Timothy Liu, M.D., M.S.
Kentfield, CA · No drug or device payments recorded (2025) · (415) 456-9680
Dr. Varinderjit Kaur, M.D.
Kentfield, CA · No drug or device payments recorded (2025) · (415) 456-9680
Dr. Dan Tran, M.D.
King City, CA · $49 in drug and device payments (2025) · (831) 385-5471
Dr. Felipe Chu, MD
La, CA · No drug or device payments recorded (2025) · (213) 484-0404
Dr. Ralph Potkin, MD
La, CA · No drug or device payments recorded (2025) · (310) 551-1178
Dr. Barbara Turner, MD
La Canada, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-9700
Dr. Carrie Ward, M.D.
La Canada, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-9700
Dr. Cecilia Kaesler, DO
La Canada, CA · $1,128 in drug and device payments (2025) · Telehealth · (818) 790-0357
Dr. Christa Chandy, M.D.
La Canada, CA · $232 in drug and device payments (2025) · (818) 248-5131
Dr. Christine Hanna, M.D.
La Canada, CA · $69 in drug and device payments (2025) · Telehealth · (818) 790-1103
Dr. Denise Soto, D.O.
La Canada, CA · $27 in drug and device payments (2025) · (818) 952-0903
Dr. Julia Cassetta, M.D.
La Canada, CA · No drug or device payments recorded (2025) · Telehealth · (818) 951-2171
Dr. Ronald Polito, M.D.
La Canada, CA · No drug or device payments recorded (2025) · (818) 421-4446
Dr. Gregory Yu, M.D.
La Canada Flintridge, CA · No drug or device payments recorded (2025) · (818) 248-8998
Dr. Raef Elsanadi, MD
Ladera Ranch, CA · No drug or device payments recorded (2025) · Telehealth · (949) 364-3582

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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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.