Internal Medicine in Napa, California
Data updated monthly · Last refresh September 2026
60 Internal Medicine providers practice in Napa, and 12% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Napa
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. Abhijit Adhye, M.D.Napa, CA · $694 in drug and device payments (2025) · Telehealth ·
(707) 637-4108 Dr. Ali Akhavan, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Amardeep Sahota, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Andrea Wong, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Andrew Tzellas, M.DNapa, CA · No drug or device payments recorded (2025) ·
(707) 254-1770 Dr. Beth Hartung, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 254-1774 Dr. Bruce SpurlockNapa, CA · No drug or device payments recorded (2025) ·
(916) 835-0204 Dr. Christina Sitenga-kako, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 252-4411 Dr. Daniel Andrews, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 257-7752 Dr. Danielle Rebischung, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Daniel Rios, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 254-1770 Dr. David Jue, MDNapa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 257-1550 Dr. David Vierra, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 252-4411 Dr. Denise Flaherty, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Dennis HawleyNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Diana Devera, D.O.Napa, CA · No drug or device payments recorded (2025) ·
(707) 251-1867 Dr. Edward Goldstein, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Eric Kopf, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 927-5136 Dr. Eric Lee, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 252-4411 Dr. Ernest Arras, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. George Vellucci, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Grace Ang, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Herbert Bazron, MDNapa, CA · $131 in drug and device payments (2025) · Telehealth ·
(707) 703-4863 Dr. Hong-shen Yeh, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Jahed Kamal, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Jan Krupp, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 259-1198 Dr. Jaskaran Momi, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. John Rupnik, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 253-8901 Dr. Julie Winter, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Kelvin Mar-tang, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Lane Melgarejo, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Larry Bryson, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(415) 990-0083 Dr. Macaria VillalobosNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Manuel Ballesca, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Maria Tabilon, MDNapa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 258-2500 Dr. Mark Singer, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 365-5151 Dr. Marlene Salvador, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Marshall Cooperson, DONapa, CA · No drug or device payments recorded (2025) ·
(707) 257-1550 Dr. Marvin Sakakihara, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Mary Rose Huber, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 252-4872 Dr. Michael Harrington, MD Dr. Michele Wilson, MDNapa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 258-2500 Dr. Mu Chou, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 253-5000 Dr. Patricia Dizmang, M.D.Napa, CA · No drug or device payments recorded (2025) ·
(707) 253-7861 Dr. Paul Sweigert, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 927-5322 Dr. Peter Mathews, MDNapa, CA · No drug or device payments recorded (2025) ·
(707) 258-2500 Dr. Phu Truong, MDNapa, CA · No drug or device payments recorded (2025) · Telehealth ·
(707) 258-2500 Conditions Internal Medicine providers in Napa, 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 Napa, California?There are 60 Internal Medicine providers with active NPI records practicing in Napa, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Napa received drug or device company payments?7 of 60 (12%) 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 Napa treat?Internal Medicine providers in Napa 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 Napa Internal Medicine across California
