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
Choose a city to see providers there.
Where Internal Medicine Doctors in Massachusetts practice
From CMS Medicare enrollment records covering 3,721 of the 6,796 providers listed here (55%). Providers who do not bill Medicare are not included in these figures.
10%solo or small practice (under 10 clinicians)
11%mid-size group (10 to 99)
79%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Internal Medicine Doctors | All clinicians in group | Main city |
| Massachusetts General Physicians Organization Inc. | 368 | 3,494 | Boston |
| Brigham and Womens Physicians Organization Inc. | 310 | 2,931 | Boston |
| Umass Memorial Medical Group Inc. | 284 | 2,494 | Worcester |
| Baystate Medical Practices Inc. | 189 | 1,350 | Springfield |
| Atrius Health Inc. | 179 | 1,214 | Boston |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Internal Medicine Doctors affiliated |
| Brigham and Women's Hospital | Boston | Nonprofit | 5 of 5 | 906 |
| Massachusetts General Hospital | Boston | Nonprofit | 5 of 5 | 881 |
| Beth Israel Deaconess Medical Center | Boston | Nonprofit | 3 of 5 | 618 |
| Brigham and Women Faulkner Hospital | Jamaica Plain | Nonprofit | 5 of 5 | 522 |
| Newton-Wellesley Hospital | Newton | Nonprofit | 5 of 5 | 498 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
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. Dahlia Riad, MDAbington, MA · No drug or device payments recorded (2025) · Telehealth ·
(781) 878-1903 Dr. Gary Jordan, M.D.Abington, MA · No drug or device payments recorded (2025) ·
(781) 878-1700 Dr. George Clairmont, MDAbington, MA · No drug or device payments recorded (2025) ·
(781) 878-1903 Dr. John Diorio, MDAbington, MA · No drug or device payments recorded (2025) ·
(781) 871-0200 Dr. Richard Lords, M.D.Abington, MA · $18 in drug and device payments (2025) · Telehealth ·
(781) 878-1700 Dr. Allessandro Girolamo, M.D.Acton, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 635-8700 Dr. Amy Churchill, MDActon, MA · $41 in drug and device payments (2025) · Telehealth ·
(978) 263-1131 Dr. Amy Lo, M.D.Acton, MA · No drug or device payments recorded (2025) ·
(978) 635-8700 Dr. Christine Brown, M.D.Acton, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 635-8700 Dr. Claudia Talland, MDActon, MA · No drug or device payments recorded (2025) ·
(978) 263-1131 Dr. Deborah Kovacs, MDActon, MA · $46 in drug and device payments (2025) · Telehealth ·
(978) 635-8700 Dr. Edwin Knights, MDActon, MA · No drug or device payments recorded (2025) ·
(978) 263-1131 Dr. Elliot Steger, M.D.Acton, MA · No drug or device payments recorded (2025) ·
(978) 263-1131 Dr. Ilia Shlimak, MDActon, MA · No drug or device payments recorded (2025) ·
(978) 635-8700 Dr. Ingrid Gorman, M.D.Acton, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 263-1131 Dr. Jon Way, M.D.Acton, MA · No drug or device payments recorded (2025) ·
(978) 263-1131 Dr. Meenakshi GargActon, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 635-8700 Dr. Narine Sharkhatunyan, MDActon, MA · $274 in drug and device payments (2025) · Telehealth ·
(978) 635-8700 Dr. Natalie Cohen, MDActon, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 635-8700 Dr. Peter Demartino, M.D.Acton, MA · No drug or device payments recorded (2025) ·
(978) 263-1425 Dr. Teli Leung-galecki, M.D.Acton, MA · No drug or device payments recorded (2025) · Telehealth ·
(978) 635-8700 Dr. Thomas Wong, MDActon, MA · No drug or device payments recorded (2025) ·
(978) 263-1131 Dr. Allen Joslin, M.D.Adams, MA · No drug or device payments recorded (2025) ·
(413) 743-1080 Dr. Benjamin Rudin, M.D.Adams, MA · No drug or device payments recorded (2025) · Telehealth ·
(413) 743-1080 Dr. Chi Cheung, M.D.Adams, MA · No drug or device payments recorded (2025) ·
(413) 743-1080 Dr. Douglas Karrel, M.D.Adams, MA · No drug or device payments recorded (2025) ·
(413) 743-1080 Dr. James Peterson, MDAdams, MA · No drug or device payments recorded (2025) ·
(413) 743-1080 Dr. Charles Weston, M.D.Agawam, MA · No drug or device payments recorded (2025) · Telehealth ·
(413) 789-6800 Dr. Christina Hayfron-benjamin, MDAgawam, MA · No drug or device payments recorded (2025) · Telehealth ·
(413) 789-6800 Dr. Daniel Weiswasser, M.D.Agawam, MA · No drug or device payments recorded (2025) ·
(413) 789-8010 Dr. Irene Cody, M.D.Agawam, MA · No drug or device payments recorded (2025) ·
(413) 789-6800 Dr. Matthew Kane, M.D.Agawam, MA · No drug or device payments recorded (2025) ·
(413) 789-6800 Dr. Issam Alghamdi, MDAllston, MA · No drug or device payments recorded (2025) ·
(857) 383-0832 Dr. Susan Saucedo, MDAllston, MA · No drug or device payments recorded (2025) ·
(617) 783-0500 Dr. Alena Tlucko, M.D.Amesbury, MA · No drug or device payments recorded (2025) ·
(978) 388-5050 Dr. George Pentoliros, M.D.Amesbury, MA · No drug or device payments recorded (2025) ·
(978) 388-5050 Dr. Helen Carter, M.D.Amesbury, MA · No drug or device payments recorded (2025) ·
(978) 388-5050 Dr. Alan Berkenwald, MDAmherst, MA · $30 in drug and device payments (2025) · Telehealth ·
(413) 256-8561 Dr. Alan Calhoun, MDAmherst, MA · No drug or device payments recorded (2025) ·
(413) 577-5000 Dr. Anne Weaver, M.D.Amherst, MA · No drug or device payments recorded (2025) ·
(413) 549-8888 Dr. Charles Hinckley, MDAmherst, MA · No drug or device payments recorded (2025) ·
(413) 577-5000 Dr. Constance Lentz, MDAmherst, MA · No drug or device payments recorded (2025) ·
(413) 577-5000 Dr. Denise Spence, MDAmherst, MA · No drug or device payments recorded (2025) · Telehealth ·
(413) 549-7080 Dr. Donald Lundgren, M.D.Amherst, MA · No drug or device payments recorded (2025) ·
(413) 256-0679 Dr. Lesley Harrington, MDAmherst, MA · No drug or device payments recorded (2025) ·
(413) 256-8561 Dr. Michelle Duffelmeyer, MD Dr. Robert Vigderman, M.D.Amherst, MA · No drug or device payments recorded (2025) · Telehealth ·
(413) 256-8561 Dr. Samah Jafari, M.D.Amherst, MA · No drug or device payments recorded (2025) ·
(413) 835-0067 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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