Internal Medicine Doctors in Massachusetts
Data updated monthly · Last refresh October 2026
6,796 Internal Medicine providers practice in Massachusetts, including 1,960 (29%) offering telehealth. The largest concentration is in Boston. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
6,796providers
1,960telehealth
Bostontop city
Internal Medicine by city in Massachusetts
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Internal Medicine providers in Massachusetts
Listed by city, largest first. 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. Mahmoud Moawad Elnaa, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 661-5500 Dr. Maira Mirza, M.DCambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 665-1000 Dr. Maren Batalden, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 665-1538 Dr. Maria NardellCambridge, MA · No drug or device payments recorded (2025) ·
(617) 665-3600 Dr. Marianne Gray, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Maribel Dagher, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Marie Haley, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 495-2001 Dr. Marie-louise Jean-baptiste, M.D.Cambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 665-3600 Dr. Mark Fishman, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 871-3400 Dr. Mark Friedman, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 491-5586 Dr. Mark Johnson, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Mark Keating, M.D.Cambridge, MA · $5,300 in drug and device payments (2025) ·
(617) 871-4059 Dr. Martha Katz, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 496-9506 Dr. Martha Martents, M.D.Cambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(161) 786-4882 Dr. Marybeth Ferrante, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 491-5586 Dr. Maryellen Rhinehart, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 253-7802 Dr. Matthew Carmody, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5055 Dr. Maureen Colton, APRNCambridge, MA · No drug or device payments recorded (2025) ·
(617) 661-1800 Dr. Mauricio Fernandes, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5571 Dr. Melvin Chalfen, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 665-3820 Dr. Mert Rusen Gulsen, MDCambridge, MA · No drug or device payments recorded (2025) ·
(646) 591-3823 Dr. Michael Carty, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 496-9506 Dr. Michael Fuller, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5026 Dr. Michael Kane, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 253-7825 Dr. Michele David, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 661-5100 Dr. Minjia YuCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Mohammed Essa, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5062 Dr. Monica SircarCambridge, MA · $117 in drug and device payments (2025) · Telehealth ·
(617) 495-5711 Dr. Muhammad Janisar, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Muhammad SaeedCambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5160 Dr. Nancy Kaddis, M.D.Cambridge, MA · $9,974 in drug and device payments (2025) · Telehealth ·
(866) 600-2273 Dr. Natasha Dolgin, MD, PHDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Nathalie Bloch, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 491-5586 Dr. Neal Peterson, MDCambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 495-5711 Dr. Nelson Aweh, MDCambridge, MA · $28 in drug and device payments (2025) ·
(617) 642-0441 Dr. Nicolai Ostberg, MDCambridge, MA · $31 in drug and device payments (2025) ·
(617) 492-3500 Dr. Norma Salazar, MDCambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 492-3500 Dr. Olivia Diamond, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Olta Tafaj Reddy, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5112 Dr. Paul Chamberlin, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 250-6062 Dr. Peter Ceglowski, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Peter KaminskiCambridge, MA · No drug or device payments recorded (2025) ·
(617) 651-0006 Dr. Peter Schlesinger, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 876-1668 Dr. Polakit Teekakirikul, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 492-3500 Dr. Rachel Haft, MDCambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 492-4545 Dr. Rafael Meller, MDCambridge, MA · No drug or device payments recorded (2025) ·
(617) 499-5112 Dr. Rashika Mathews, M.D.Cambridge, MA · No drug or device payments recorded (2025) · Telehealth ·
(617) 661-5100 Dr. Rebecca Konkle, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 495-4414 Dr. Ricardo Wellisch, M.D.Cambridge, MA · $30 in drug and device payments (2025) · Telehealth ·
(617) 661-4600 Dr. Richard Cohen, M.D.Cambridge, MA · No drug or device payments recorded (2025) ·
(617) 253-7430 Conditions Internal Medicine providers in 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 Massachusetts?There are 6,796 Internal Medicine providers with active NPI records practicing in Massachusetts, according to federal NPPES data refreshed monthly.
Do Internal Medicine providers in Massachusetts offer telehealth?Yes. 1,960 of the 6,796 Internal Medicine providers in Massachusetts (about 29%) report offering telehealth services in CMS data.
Which cities in Massachusetts have the most Internal Medicine providers?Boston (2,322), Worcester (443), Cambridge (299) have the highest concentration of Internal Medicine providers in Massachusetts.
How many Internal Medicine providers in Massachusetts received drug or device company payments?1,344 of 6,796 Internal Medicine providers in Massachusetts (20%) 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 Massachusetts treat?Internal Medicine providers 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 counts and profiles 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.
Do most Internal Medicine Doctors in Massachusetts work in independent practices or large health systems?Among 3,721 Internal Medicine Doctors in Massachusetts enrolled in Medicare, 10% bill through a solo or small practice with fewer than 10 clinicians, 11% through a mid-size group of 10 to 99, and 79% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Internal Medicine Doctors in Massachusetts work at?According to CMS facility affiliation records, the Massachusetts hospitals where the most Internal Medicine Doctors hold privileges are Brigham and Women's Hospital in Boston; Massachusetts General Hospital in Boston; Beth Israel Deaconess Medical Center in Boston.
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