Internal Medicine in Waltham, Massachusetts
Data updated monthly · Last refresh September 2026
31 Internal Medicine providers practice in Waltham, and 16% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.
Internal Medicine providers in Waltham
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. Alice Zacarian, M.D.Waltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 647-6920 Dr. Allison Mcdonough, MDWaltham, MA · $408 in drug and device payments (2025) · Telehealth ·
(781) 487-4040 Dr. Bard Geesaman, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(617) 529-7111 Dr. Barry Ehrlich, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(617) 243-5590 Dr. Brittany Hansen, MDWaltham, MA · No drug or device payments recorded (2025) ·
(781) 487-6800 Dr. Christina Gelev, MDWaltham, MA · $179 in drug and device payments (2025) · Telehealth ·
(781) 487-4350 Dr. Daniel Horn, MDWaltham, MA · No drug or device payments recorded (2025) ·
(866) 849-0692 Dr. David Margulies, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(617) 549-0601 Dr. Denise Basow, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 392-2029 Dr. Devasena Balasubramaniam, M.D.Waltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 487-4350 Dr. Edward Busick, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 647-0855 Dr. Elissa Stecker, M.D,Waltham, MA · No drug or device payments recorded (2025) ·
(781) 647-6920 Dr. Hadia Tirmizi, M.D.Waltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 899-3334 Dr. Henry Merola, M.D.Waltham, MA · $128 in drug and device payments (2025) ·
(781) 894-8200 Dr. Joanna Schwartz, M.D.Waltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 487-4040 Dr. Julie Pfeffer, MDWaltham, MA · No drug or device payments recorded (2025) ·
(781) 647-6920 Dr. Leslie Vensel, MDWaltham, MA · No drug or device payments recorded (2025) ·
(781) 487-4350 Dr. Linda Pololi, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 736-8135 Dr. Maria Ponsillo, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 434-4226 Dr. Mark Shankman, MDWaltham, MA · No drug or device payments recorded (2025) ·
(617) 243-5590 Dr. Matthew Fickie, MDWaltham, MA · No drug or device payments recorded (2025) ·
(781) 647-6920 Dr. Monica Manandhar, MDWaltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 487-4350 Dr. Nathaniel Gunn, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 693-3786 Dr. Philip Reilly, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 398-0702 Dr. Rachel Ackerman, MDWaltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 647-6920 Dr. Steven Kanner, MDWaltham, MA · No drug or device payments recorded (2025) ·
(781) 684-0600 Dr. Thomas Fry, MDWaltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 487-4350 Dr. Vanessa Vidal, M.D.Waltham, MA · No drug or device payments recorded (2025) ·
(781) 647-6920 Dr. Wissam Khoory, M.D.Waltham, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 893-4490 Conditions Internal Medicine providers in Waltham, Massachusetts 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 Waltham, Massachusetts?There are 31 Internal Medicine providers with active NPI records practicing in Waltham, according to federal NPPES data refreshed monthly.
How many Internal Medicine providers in Waltham received drug or device company payments?5 of 31 (16%) 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 Waltham treat?Internal Medicine providers in Waltham 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 Waltham Internal Medicine across Massachusetts