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Internal Medicine in Fountain Valley, California

Data updated monthly · Last refresh September 2026

83 Internal Medicine providers practice in Fountain Valley, and 41% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Fountain Valley

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. Aadesh Sachdeva, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Adam Solomon, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 377-2900
Dr. Ahmed Al-sadek, M.D.
Fountain Valley, CA · $396 in drug and device payments (2025) · Telehealth · (310) 692-0224
Dr. Alan Dang, M.D.
Fountain Valley, CA · $3,245 in drug and device payments (2025) · (714) 369-6074
Dr. Ali Habib, D.O
Fountain Valley, CA · $21 in drug and device payments (2025) · (714) 665-1797
Dr. Alton Foran
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 549-1300
Dr. Andy Truong, M.D.
Fountain Valley, CA · $769 in drug and device payments (2025) · (714) 323-6446
Dr. Angela Biesen, D.O.
Fountain Valley, CA · $31 in drug and device payments (2025) · (714) 965-2500
Dr. Barbara Lever, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 964-6229
Dr. Brandon Khaw, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 549-1300
Dr. Calvin Tint, MD
Fountain Valley, CA · $125 in drug and device payments (2025) · (714) 549-1300
Dr. Cambria Hembree, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 965-2500
Dr. Collin Vu, M.D.
Fountain Valley, CA · $3,468 in drug and device payments (2025) · Telehealth · (714) 783-1838
Dr. Deeling Teng, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 377-2900
Dr. Don Phung, DO
Fountain Valley, CA · No drug or device payments recorded (2025) · Telehealth · (714) 549-1300
Dr. Eddie Ly, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Ellen Gim, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Eric Panahi, M.D.
Fountain Valley, CA · $2,117 in drug and device payments (2025) · Telehealth · (714) 825-0891
Dr. Erin Jo
Fountain Valley, CA · No drug or device payments recorded (2025) · (877) 844-0012
Dr. Fazilath Fatima, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (657) 241-3592
Dr. Felina Innaci Dass, MD
Fountain Valley, CA · $118 in drug and device payments (2025) · (714) 549-4081
Dr. Gail Frances Liezl Abcede, M.D.
Fountain Valley, CA · $22 in drug and device payments (2025) · (657) 241-3592
Dr. George Hong, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 964-6229
Dr. Georgina Marquez, DVM
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 241-9001
Dr. Hoang Nguyen, M.D.
Fountain Valley, CA · $340 in drug and device payments (2025) · Telehealth · (714) 531-7930
Dr. Ihong Chen, MD
Fountain Valley, CA · $17 in drug and device payments (2025) · Telehealth · (714) 378-5330
Dr. Ivan Rudenko, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Jack Middlebrooks, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 965-2500
Dr. Jacob Koopman, DO
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Janice Rivelle
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 965-2500
Dr. Jason Gajarsa, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 751-3540
Dr. Jessica Vo, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (877) 844-0012
Dr. Joel Bartlett, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (657) 241-9090
Dr. John Ho, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 377-2900
Dr. John Wang, M.D.
Fountain Valley, CA · $27 in drug and device payments (2025) · Telehealth · (714) 378-5330
Dr. Joseph Desanto, M.D.
Fountain Valley, CA · $39 in drug and device payments (2025) · (949) 432-0918
Dr. Julie Oh, MD
Fountain Valley, CA · $85 in drug and device payments (2025) · (714) 717-4415
Dr. Karen Don, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 965-2500
Dr. Kari Vu, MD
Fountain Valley, CA · $187 in drug and device payments (2025) · (760) 835-4140
Dr. Kathryn Rigonan, MD
Fountain Valley, CA · $478 in drug and device payments (2025) · (714) 754-0100
Dr. Ketan Bhakta, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · Telehealth · (714) 847-6727
Dr. Kimberly Motta, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 665-1797
Dr. Kim Trinh, M.D.
Fountain Valley, CA · $1,261 in drug and device payments (2025) · (714) 549-1300
Dr. Kristine Arthur, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 549-1300
Dr. Lalita Komanapalli, MD
Fountain Valley, CA · $17 in drug and device payments (2025) · Telehealth · (714) 378-5330
Dr. Lauri Seymour, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · (714) 965-2500
Dr. Lawrence Tran, M.D.
Fountain Valley, CA · No drug or device payments recorded (2025) · (949) 340-9530
Dr. Long Hua, MD
Fountain Valley, CA · No drug or device payments recorded (2025) · Telehealth · (714) 477-8400
Dr. Mahmood Mirbagheri, MD
Fountain Valley, CA · $125 in drug and device payments (2025) · (714) 665-1797
Dr. Mai Phuong Nguyen, MD
Fountain Valley, CA · $57 in drug and device payments (2025) · (844) 527-8620

Conditions Internal Medicine providers in Fountain Valley, 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 Fountain Valley, California?

There are 83 Internal Medicine providers with active NPI records practicing in Fountain Valley, according to federal NPPES data refreshed monthly.

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

34 of 83 (41%) 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 Fountain Valley treat?

Internal Medicine providers in Fountain Valley 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 Fountain Valley 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.