Family Medicine in Ontario, California
Data updated monthly · Last refresh September 2026
25 Family Medicine providers practice in Ontario, and 28% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Family Medicine providers in Ontario
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. Andrelee Taganas, M.D.Ontario, CA · $150 in drug and device payments (2025) ·
(909) 427-7132 Dr. Chao-ming Lin, MDOntario, CA · $266 in drug and device payments (2025) ·
(909) 986-4692 Dr. Charles Ho, M.D.Ontario, CA · $160 in drug and device payments (2025) ·
(909) 986-2288 Dr. Daniel TannousOntario, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. David Diep, DOOntario, CA · No drug or device payments recorded (2025) · Telehealth ·
(713) 835-6235 Dr. Fernando AvilaOntario, CA · No drug or device payments recorded (2025) ·
(833) 574-2273 Dr. Hetana Patel, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(408) 504-1051 Dr. Joanne Benzor, MDOntario, CA · No drug or device payments recorded (2025) ·
(909) 988-3288 Dr. Kenneth Lee, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(443) 832-9673 Dr. Luis A Lomeli, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 983-6622 Dr. Maristella Cosip, FNPOntario, CA · No drug or device payments recorded (2025) ·
(909) 942-1864 Dr. Mauricio Bonilla, MDOntario, CA · No drug or device payments recorded (2025) ·
(909) 363-9300 Dr. Michaella Gaite, DOOntario, CA · No drug or device payments recorded (2025) · Telehealth ·
(833) 574-2273 Dr. Naila Mubashar, M.DOntario, CA · $285 in drug and device payments (2025) ·
(909) 988-2555 Dr. Nicholas Ely, MDOntario, CA · No drug or device payments recorded (2025) ·
(909) 363-9300 Dr. Rashmi Godugu, MDOntario, CA · $846 in drug and device payments (2025) ·
(909) 482-4462 Dr. Renu Bhupathy, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 605-8000 Dr. Rohin Talati, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 467-0797 Dr. Ruth Chambi - Hernandez, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 297-3337 Dr. Sau ThongOntario, CA · No drug or device payments recorded (2025) ·
(909) 896-9292 Dr. Sheila Marie Adan, D.O.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 724-5000 Dr. Teodoro Diaz, DOOntario, CA · No drug or device payments recorded (2025) ·
(909) 773-0022 Dr. Vache Chakmakian, M.D.Ontario, CA · No drug or device payments recorded (2025) ·
(909) 988-2555 Dr. William Paley, D.O.Ontario, CA · $671 in drug and device payments (2025) ·
(909) 988-2555 Conditions Family Medicine providers in Ontario, California commonly treat
Patients often search by condition rather than specialty. These are conditions typically managed by Family Medicine providers. Individual practices vary, so confirm with the provider before booking.
- Annual physicals
- High blood pressure
- Type 2 diabetes
- Preventive care
- Minor injuries
Common questions
How many Family Medicine providers are in Ontario, California?There are 25 Family Medicine providers with active NPI records practicing in Ontario, according to federal NPPES data refreshed monthly.
How many Family Medicine providers in Ontario received drug or device company payments?7 of 25 (28%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
What conditions do Family Medicine providers in Ontario treat?Family Medicine providers in Ontario commonly treat annual physicals, high blood pressure, type 2 diabetes, preventive care, minor injuries 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.
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