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Internal Medicine in Fullerton, California

Data updated monthly · Last refresh September 2026

44 Internal Medicine providers practice in Fullerton, and 68% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Fullerton

Listed alphabetically. 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. Alex Leung, M.D
Fullerton, 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, MD
Fullerton, CA · $26 in drug and device payments (2025) · Telehealth · (714) 626-8615
Dr. Anthony Crymes, MD
Fullerton, CA · No drug or device payments recorded (2025) · (714) 447-5027
Dr. Arash Farahanchi, DO
Fullerton, CA · No drug or device payments recorded (2025) · (714) 449-6230
Dr. Arun Patel, MD
Fullerton, CA · $864 in drug and device payments (2025) · (714) 871-6161
Dr. Bradley Borsari, MD
Fullerton, 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, MD
Fullerton, CA · No drug or device payments recorded (2025) · (714) 578-8669
Dr. Eugene Boston
Fullerton, 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, MD
Fullerton, CA · $27 in drug and device payments (2025) · Telehealth · (626) 964-3326
Dr. Johnny Wu, MD
Fullerton, 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
Dr. Kiho Woo, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 449-4800
Dr. Kristopher Huston, M.D.
Fullerton, CA · $61 in drug and device payments (2025) · (714) 871-3280
Dr. Lalitha Vakkalanka, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 773-4111
Dr. Leo Garcia, M.D.
Fullerton, CA · $51 in drug and device payments (2025) · Telehealth · (714) 626-8610
Dr. Linda Lam, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 871-3280
Dr. Michael Katz, MD
Fullerton, CA · $220 in drug and device payments (2025) · (714) 992-3969
Dr. Mythili Nagaraj, M.D.
Fullerton, CA · $275 in drug and device payments (2025) · Telehealth · (714) 905-4072
Dr. Naureen Tareen, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 403-9942
Dr. Panagiotis Bougas, M.D.
Fullerton, CA · $135 in drug and device payments (2025) · (714) 446-7454
Dr. Patrick Su, D.O.
Fullerton, CA · $25 in drug and device payments (2025) · (714) 992-3969
Dr. Pavani Reddy, MD
Fullerton, CA · $102 in drug and device payments (2025) · (714) 446-7454
Dr. Pengyi Zhu, DO
Fullerton, CA · $90 in drug and device payments (2025) · (714) 992-3969
Dr. Pius Kim, M.D.
Fullerton, CA · $510 in drug and device payments (2025) · (714) 447-5027
Dr. Rajiv Bhavsar, M.D.
Fullerton, CA · $881 in drug and device payments (2025) · Telehealth · (714) 441-0591
Dr. Robert Francis, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 446-7800
Dr. Ruben Cabral, MD
Fullerton, CA · $49 in drug and device payments (2025) · Telehealth · (714) 626-8610
Dr. Sammie Cheng, M.D.
Fullerton, CA · No drug or device payments recorded (2025) · (714) 705-9877
Dr. Sang Hoon Ahn, M.D.
Fullerton, CA · $124 in drug and device payments (2025) · Telehealth · (657) 888-9919
Dr. Sara Choi, DO
Fullerton, CA · $335 in drug and device payments (2025) · (714) 992-3969
Dr. Sothy Pheng, MD
Fullerton, CA · $562 in drug and device payments (2025) · (978) 551-8088
Dr. Stephen Yoon, M.D.
Fullerton, CA · $234 in drug and device payments (2025) · (714) 992-3000
Dr. Steven Luminais, MD
Fullerton, CA · $1,046 in drug and device payments (2025) · Telehealth · (714) 449-5900
Dr. Tuan Trinh, M.D.
Fullerton, CA · $550 in drug and device payments (2025) · (714) 992-3000
Dr. Uma Rao, MD
Fullerton, CA · $33 in drug and device payments (2025) · (714) 992-2765
Dr. Victor Nekrasov, M.D.
Fullerton, CA · $67 in drug and device payments (2025) · (714) 449-6230
Dr. Yang Li, MD
Fullerton, CA · $145 in drug and device payments (2025) · (714) 992-3257

Conditions Internal Medicine providers in Fullerton, 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 Fullerton, California?

There are 44 Internal Medicine providers with active NPI records practicing in Fullerton, according to federal NPPES data refreshed monthly.

How many Internal Medicine providers in Fullerton received drug or device company payments?

30 of 44 (68%) 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 Fullerton treat?

Internal Medicine providers in Fullerton 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 records 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.

All specialties in Fullerton Internal Medicine across California

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.