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 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. Timothy WangFresno, CA · $98 in drug and device payments (2025) · Telehealth ·
(559) 499-6500 Dr. Tin Kyaw, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 241-6405 Dr. Tsing-tong Kwok, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 442-0855 Dr. Tuan Luu, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 268-1079 Dr. Tuan Tran, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 498-7100 Dr. Tu Depry, DOFresno, CA · No drug or device payments recorded (2025) ·
(559) 493-4433 Dr. Tung Nguyen, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 448-4500 Dr. Tyler BirgesFresno, CA · No drug or device payments recorded (2025) ·
(559) 499-6500 Dr. Uzoma Chukwu, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 450-6310 Dr. Varija Bhogireddy, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 228-4245 Dr. Vera Valdez, DOFresno, CA · No drug or device payments recorded (2025) ·
(559) 448-4436 Dr. Vicente Santiago, MDFresno, CA · No drug or device payments recorded (2025) · Telehealth ·
(559) 225-6100 Dr. Vidya Panguluri, M.DFresno, CA · $76 in drug and device payments (2025) · Telehealth ·
(559) 435-2630 Dr. Vishal Pall, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 225-6100 Dr. Wagih Ibrahim, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 499-6500 Dr. Wajiha Irshad, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 450-3000 Dr. Wallace Yang, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 448-4500 Dr. Wei Gu, M.D.Fresno, CA · No drug or device payments recorded (2025) ·
(559) 225-6100 Dr. Wenbiao Zhang, MDFresno, CA · $2,372 in drug and device payments (2025) · Telehealth ·
(559) 447-8956 Dr. William Geissert, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 450-2273 Dr. William Holmes, M.D.Fresno, CA · $1,742 in drug and device payments (2025) · Telehealth ·
(559) 271-6365 Dr. William Latson, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 450-5672 Dr. Willis ChangFresno, CA · No drug or device payments recorded (2025) ·
(559) 450-5777 Dr. Yagnika Patel, DOFresno, CA · No drug or device payments recorded (2025) ·
(559) 459-6000 Dr. Yudhveer Brar, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 450-5375 Dr. Zahara Kanji, MDFresno, CA · No drug or device payments recorded (2025) ·
(559) 228-4222 Dr. Zehra Rehman, M.DFresno, CA · No drug or device payments recorded (2025) ·
(559) 225-6100 Dr. Marilyn Benck, MDFriant, CA · No drug or device payments recorded (2025) ·
(559) 822-3785 Dr. Alex Leung, M.DFullerton, CA · $1,146 in drug and device payments (2025) ·
(714) 449-4842 Dr. Alex Ly, M.D.Fullerton, CA · $106 in drug and device payments (2025) ·
(714) 992-3000 Dr. Amy Alias, MDFullerton, CA · $26 in drug and device payments (2025) · Telehealth ·
(714) 626-8615 Dr. Anthony Crymes, MDFullerton, CA · No drug or device payments recorded (2025) ·
(714) 447-5027 Dr. Arash Farahanchi, DOFullerton, CA · No drug or device payments recorded (2025) ·
(714) 449-6230 Dr. Arun Patel, MDFullerton, CA · $864 in drug and device payments (2025) ·
(714) 871-6161 Dr. Bradley Borsari, MDFullerton, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 626-8610 Dr. David Ruckman, M.D.Fullerton, CA · No drug or device payments recorded (2025) · Telehealth ·
(714) 626-8650 Dr. Ehsan Safaie-fard, M.D.Fullerton, CA · $69 in drug and device payments (2025) ·
(714) 449-4800 Dr. Eleanor Kelly, MDFullerton, CA · No drug or device payments recorded (2025) ·
(714) 578-8669 Dr. Eugene BostonFullerton, CA · No drug or device payments recorded (2025) ·
(714) 449-6990 Dr. Friedhelm Cordes, M.D.Fullerton, CA · No drug or device payments recorded (2025) ·
(714) 626-8610 Dr. Jae Kim, M.D.Fullerton, CA · $239 in drug and device payments (2025) ·
(714) 446-5590 Dr. Jane Quon, M.D.Fullerton, CA · No drug or device payments recorded (2025) ·
(714) 990-5001 Dr. Jimmy Liao, M.D.Fullerton, CA · $329 in drug and device payments (2025) ·
(310) 403-2677 Dr. John Lee, MDFullerton, CA · $27 in drug and device payments (2025) · Telehealth ·
(626) 964-3326 Dr. Johnny Wu, MDFullerton, CA · $315 in drug and device payments (2025) · Telehealth ·
(714) 626-8650 Dr. Jyotika Wali, M.D.Fullerton, CA · $665 in drug and device payments (2025) · Telehealth ·
(714) 451-0000 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.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
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.
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