Internal Medicine in Fontana, California
Data updated monthly · Last refresh September 2026
111 Internal Medicine providers practice in Fontana, and 15% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Fontana
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. John Uniat, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Jonahlie Quintos-monsale, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-7032 Dr. Jonathan Lo, MDFontana, CA · $141 in drug and device payments (2025) ·
(909) 427-3910 Dr. Joseph Paredes, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Joyce Taur, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Julie Reddoch, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Kanchana Keerthipala, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 904-6589 Dr. Kareem Yahya, MDFontana, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Katherine Lin, D.O.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 839-1912 Dr. Les Liu, MDFontana, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 427-3910 Dr. Lev Rasin, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Lih-jiau Chen, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Loan Pham, MDFontana, CA · $124 in drug and device payments (2025) ·
(909) 427-3910 Dr. Loi Tran, DOFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Lydia Villanueva, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 822-1164 Dr. Manuel Mojica, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Margaret Mou, DOFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Maria Relente-santos, MDFontana, CA · $166 in drug and device payments (2025) ·
(909) 823-8000 Dr. Mario Perez, D.O.Fontana, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 427-3077 Dr. Mark Eicher, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Melanie Wise, MDFontana, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Michael Chen, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Michael Lee, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Muhammad Khan, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Nasser Liasi, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-1303 Dr. Neha Pandey, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5500 Dr. Paloma KhamlyFontana, CA · No drug or device payments recorded (2025) ·
(323) 409-6566 Dr. Pamela Yamanishi, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Paul Kim, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Paul Robb, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Philomena Cho, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Pooneh Esfahani, DOFontana, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 427-3910 Dr. Prasit Vassantachart, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Ragu Sivarajan, D.O,.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 330-3939 Dr. Ramesh Patel, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 822-1403 Dr. Robert LiuFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-5000 Dr. Rofina Widjaja, MDFontana, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 427-3910 Dr. Ruperto Mendiones, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Samuel Paw, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Sanjay Bhakta, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Scott Wojtowich, DOFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Sean Khorami, M.D.Fontana, CA · No drug or device payments recorded (2025) ·
(909) 427-2608 Dr. Sherilyn Savery, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Sonja Tang, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Stanley Ng, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Stephen Myung, MDFontana, CA · No drug or device payments recorded (2025) ·
(909) 427-3910 Dr. Steven Ko, MDFontana, CA · $2,151 in drug and device payments (2025) ·
(909) 427-2608 Dr. Suvan Sachdev, MDFontana, CA · No drug or device payments recorded (2025) · Telehealth ·
(909) 427-3910 Dr. Syeda AmeenaFontana, CA · $191 in drug and device payments (2025) ·
(909) 355-1296 Conditions Internal Medicine providers in Fontana, 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 Fontana, California?There are 111 Internal Medicine providers with active NPI records practicing in Fontana, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Fontana received drug or device company payments?17 of 111 (15%) 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 Fontana treat?Internal Medicine providers in Fontana 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 Fontana Internal Medicine across California
