HealthcareDiscovery.AI / Doctors / California / Tustin / Internal Medicine

Internal Medicine in Tustin, California

Data updated monthly · Last refresh September 2026

34 Internal Medicine providers practice in Tustin, and 32% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Tustin

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. Anthony Lam, MD
Tustin, CA · $33,812 in drug and device payments (2025) · Telehealth · (949) 381-5800
Dr. Bernard Bennett, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-9890
Dr. Carl Selin, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 838-5610
Dr. Chalat Rajaram, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 547-3346
Dr. Charlie Huang, D.O.
Tustin, CA · No drug or device payments recorded (2025) · Telehealth · (714) 477-8320
Dr. Daniel Eichinger, DO
Tustin, CA · No drug or device payments recorded (2025) · (714) 505-7110
Dr. David Mcdonough, M.D.
Tustin, CA · $430 in drug and device payments (2025) · (310) 288-5933
Dr. Deepika Lekawa, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 838-8878
Dr. Don Oh, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 222-3258
Dr. Drumil Bhatt, MD
Tustin, CA · $109 in drug and device payments (2025) · Telehealth · (714) 616-0506
Dr. Elizabeth Tsai, D.O.
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-1600
Dr. Eric Khau, MD
Tustin, CA · No drug or device payments recorded (2025) · Telehealth · (714) 477-8320
Dr. Grace Chang Broderick, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (888) 988-2800
Dr. Huong Duong, M.D.
Tustin, CA · $495 in drug and device payments (2025) · (714) 838-5610
Dr. Jacqueline Do, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 505-7110
Dr. Jean Louis Selam
Tustin, CA · No drug or device payments recorded (2025) · (714) 734-7944
Dr. Jeremy Lam, M.D.
Tustin, CA · No drug or device payments recorded (2025) · Telehealth · (714) 709-8000
Dr. Julia Motherway, M.D.
Tustin, CA · $479 in drug and device payments (2025) · (714) 838-5610
Dr. Kenneth Thaler, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 669-4449
Dr. Kien Tran, MD
Tustin, CA · No drug or device payments recorded (2025) · (832) 287-6252
Dr. Lisa Abdishoo, MD
Tustin, CA · $98 in drug and device payments (2025) · (714) 247-0300
Dr. Loutfi Sakkal, DO
Tustin, CA · $62 in drug and device payments (2025) · (714) 665-9890
Dr. Madonna Nicolai, CFNP
Tustin, CA · No drug or device payments recorded (2025) · (714) 550-9990
Dr. Mark Schafer, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-1661
Dr. Misty Rydelski, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 449-4800
Dr. Mohamed Al-sadek, M.D.
Tustin, CA · No drug or device payments recorded (2025) · Telehealth · (949) 335-5656
Dr. Patrick Clarke, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (888) 277-0080
Dr. Pin-hung Hsieh, M.D.
Tustin, CA · $1,474 in drug and device payments (2025) · (714) 573-8200
Dr. Robert Bader, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 247-0300
Dr. Samuel Limbong, M.D.
Tustin, CA · No drug or device payments recorded (2025) · (714) 709-8000
Dr. Stela Kostova-abadjieva, MD
Tustin, CA · No drug or device payments recorded (2025) · (714) 665-9890
Dr. Susan Ban, M.D.
Tustin, CA · $103 in drug and device payments (2025) · (714) 838-5610
Dr. Tariq Khan, M.D.
Tustin, CA · $21 in drug and device payments (2025) · Telehealth · (657) 218-9859
Dr. Thomas Hwang, M.D.
Tustin, CA · $464 in drug and device payments (2025) · (714) 838-5610

Conditions Internal Medicine providers in Tustin, 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 Tustin, California?

There are 34 Internal Medicine providers with active NPI records practicing in Tustin, according to federal NPPES data refreshed monthly.

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

11 of 34 (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 Tustin treat?

Internal Medicine providers in Tustin 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 Tustin 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.