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. Maryanne Ibrahim, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 665-4614 Dr. Melanie Lin, MDFountain Valley, CA · $14 in drug and device payments (2025) ·
(714) 378-6307 Dr. Michael Benefiel, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 340-9530 Dr. Michael Duan, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 844-0012 Dr. Mikio Tachibana, MDFountain Valley, CA · $567 in drug and device payments (2025) · Telehealth ·
(714) 966-2800 Dr. Minsen Mok, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 306-6104 Dr. Monica Hanna, D.O.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 844-0012 Dr. Nancy Hanna, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 665-1797 Dr. Naomi Cheung, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 549-1300 Dr. Nathan Kwong, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 665-1797 Dr. Nguyen Nguyen, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 665-1797 Dr. Nicole Chow, MDFountain Valley, CA · $57 in drug and device payments (2025) ·
(714) 965-2500 Dr. Paul Sychangco, M.D,Fountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 844-0012 Dr. Richard Cho, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 923-3200 Dr. Samiya Hussain, M.D.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 665-1797 Dr. Sang Noh, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 957-6055 Dr. Sheila Nguyen, MDFountain Valley, CA · $15 in drug and device payments (2025) ·
(714) 665-1797 Dr. Sina Milani, MDFountain Valley, CA · $120 in drug and device payments (2025) · Telehealth ·
(714) 549-1300 Dr. Smitha Daka, M.DFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 964-6229 Dr. Stanley Arnold, MDFountain Valley, CA · $31 in drug and device payments (2025) ·
(714) 965-2500 Dr. Stanley NguyenFountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 340-9530 Dr. Steven Chacko, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 279-5289 Dr. Su Yong Kuo, MDFountain Valley, CA · $59 in drug and device payments (2025) ·
(714) 545-9110 Dr. Tamara Fogarty, MDFountain Valley, CA · $395 in drug and device payments (2025) ·
(714) 965-2500 Dr. Tenzing Wangyal, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(714) 964-6229 Dr. Tokameh Entezari, MDFountain Valley, CA · No drug or device payments recorded (2025) ·
(949) 340-9530 Dr. Tracy Tran, DOFountain Valley, CA · $431 in drug and device payments (2025) · Telehealth ·
(714) 966-7200 Dr. Truong-sinh Leduc, M.D.Fountain Valley, CA · $11,449 in drug and device payments (2025) ·
(714) 540-0105 Dr. Vamsi VemireddyFountain Valley, CA · No drug or device payments recorded (2025) ·
(877) 844-0012 Dr. Victor Lin, MDFountain Valley, CA · $62 in drug and device payments (2025) ·
(714) 965-2500 Dr. Viney Soni, M.DFountain Valley, CA · $1,903 in drug and device payments (2025) · Telehealth ·
(714) 545-8700 Dr. Wasim Raja, M.D.Fountain Valley, CA · $21 in drug and device payments (2025) ·
(714) 486-3477 Dr. Ziad Chaya, D.O.Fountain Valley, CA · No drug or device payments recorded (2025) ·
(657) 241-3592 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.
- High blood pressure
- Type 2 diabetes
- High cholesterol
- Preventive care
- Chronic disease management
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
