Internists in Massachusetts
- Internists
- 6,731
- Linked to a hospital or group
- 5,061
- Hospitals with an internist
- 84
- Medical groups with an internist
- 479
- Cities
- 207
There are 6,731 internists in Massachusetts. Massachusetts General Physicians Organization (MGPO) has the most, 616, and Brigham and Women's Hospital has the most affiliated internists, 1,021. Boston is home to 2,110, and 36% finished medical school 30 or more years ago.
Find work emails and mobile numbers for all 6,731 Massachusetts internists
Validated work emails and mobile numbers for Massachusetts internists, found through healthcare waterfall enrichment, with a free Dmand AI account.
Massachusetts internists, listed A to Z by last name
Each internist on the list has internal medicine as their primary specialty and a Massachusetts practice address. The list shows the NPI and city, and how many hospitals and medical groups each one practices with. A free account names every hospital and group, with validated contacts.
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Sort and filter all 6,731 Massachusetts internists by city, hospital, medical group, the EHR they use and Medicare volume in Dmand AI.
Showing 1 to 10 of 5,528 Massachusetts internists
The list shows the 5,528 internists with a public profile. The other 1,203 are counted in the total and searchable with a free account.
Sources: NPPES NPI Registry (CMS) and Dmand AI Affiliation Data
For health IT teams
Dmand AI has the EHR for 5,921 of 6,731 Massachusetts internists, at their hospital and their practice. Filter by Epic, Oracle Health, MEDITECH, athenahealth and more, then reach them with validated work emails and mobile numbers.
Massachusetts General Physicians Organization (MGPO) has the most internists in Massachusetts, with 616
Massachusetts General Hospital is second with 587, and Brigham and Women's Hospital third with 505. Counts are internists with a Massachusetts address linked to each group.
Sources: Dmand AI Affiliation Data and Dmand AI Org Hierarchy Data
Brigham and Women's Hospital has the most affiliated internists in Massachusetts, with 1,021
Massachusetts General Hospital in Boston is second with 1,003, and Beth Israel Deaconess Medical Center third with 753. Massachusetts internists are affiliated with 84 hospitals in all.
See every hospital and group for each Massachusetts internist
Each public profile names one place an internist practices. A free account shows all of them, with the employer, the EHR and validated contacts.
Source: Dmand AI Affiliation Data
Boston has the most internists in Massachusetts, with 2,110
More Massachusetts cities with internists
- Newton Lower Falls143
- Salem135
- Lowell133
- South Weymouth122
- Brockton111
- Auburndale110
- Brighton103
- Braintree97
- Framingham92
Internists practice in 207 Massachusetts cities. Every city with 10 or more has its own page.
Source: NPPES NPI Registry (CMS)
Most Massachusetts internists practice at a hospital: 4,394 of the 4,949 with a mapped site
2,646 also practice at a medical group site, and 1,545 at home health agencies. An internist can practice at several kinds of site, so the shares overlap.
Massachusetts internists by site of care
- Hospitals4,394
- Medical group practices2,646
- Home health agencies1,545
- Hospices647
- FQHCs602
Sources: Dmand AI Affiliation Data and Dmand AI Practice Data
36% of Massachusetts internists finished medical school 30 or more years ago
1,655 of the 4,539 Massachusetts internists with a graduation year on file. 728 graduated in the last 10 years, fewer than graduated 40 or more years ago.
Physicians by years since medical school
- Under 10 years ago728
- 10 to 19 years ago1,185
- 20 to 29 years ago971
- 30 to 39 years ago920
- 40 or more years ago735
Source: Dmand AI Professional Profile Data
Every Massachusetts internist profile shows current hospitals and groups, Medicare activity and NPI details
- Primary practiceThe main place they practice, with its type and cityOn every profile
- Every site of careEach hospital, clinic and group where they practice nowWith a free account
- EmployerThe organization they work for, when one is on fileWith a free account
- Medicare servicesServices and procedure codes billed to Medicare, from CMSOn every profile
- Medicare Part D prescribingClaims and drug costs from Part D, from CMSOn every profile
- Industry paymentsPayments from drug and device makers, from CMS Open PaymentsOn every profile
- Publications and clinical trialsResearch papers and trials linked to the NPI, when on fileOn every profile
- Licenses and graduation yearState license numbers and medical school graduation yearOn every profile
- NPI detailsNPI, enumeration date, primary taxonomy and practice addressOn every profile
- Work email and mobile numberFound on request through healthcare waterfall enrichment, then validatedWith a free account
- EHR in useThe EHR at each site where they practiceWith a free account
- Colleagues at each siteThe clinicians they work with at each hospital and groupWith a free account
Free account: 30 days free, self-serve, no credit card.
Sources: NPPES NPI Registry (CMS), Medicare Physician & Other Practitioners (CMS), Open Payments (CMS) and Dmand AI Affiliation Data
Sources for the Massachusetts internist directory
| Data on this page | Source |
|---|---|
| HCPs, types and specialties | NPPES NPI Registry (CMS) and Dmand AI Professional Profile Data |
| Sites of care, hospitals and medical groups | Dmand AI Affiliation Data |
| Medical school graduation year | Dmand AI Professional Profile Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
Internists are HCPs whose primary specialty is internal medicine (taxonomy code 207R00000X), with an active NPI and a Massachusetts practice address.
FAQ
Frequently asked questions about internists in Massachusetts
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
How many internists are in Massachusetts?
6,731 internists have an active NPI, a Massachusetts practice address and internal medicine (taxonomy code 207R00000X) as their primary specialty. 5,061 of them are linked to a hospital or medical group.
Which Massachusetts medical groups have the most internists?
Massachusetts General Physicians Organization (MGPO), with 616, followed by Massachusetts General Hospital with 587 and Brigham and Women's Hospital with 505.
Which Massachusetts hospitals have the most internists?
Brigham and Women's Hospital, with 1,021 affiliated internists, followed by Massachusetts General Hospital with 1,003 and Beth Israel Deaconess Medical Center with 753.
Which Massachusetts cities have the most internists?
Boston, with 2,110, followed by Springfield (296) and Cambridge (282). Internists practice in 207 Massachusetts cities in all.
How many Massachusetts internists finished medical school 30 or more years ago?
1,655 of the 4,539 with a graduation year on file, or 36%. 728 graduated in the last 10 years.
What is the taxonomy code for internal medicine?
207R00000X is the NPPES taxonomy code for internal medicine. Sub-specialties with their own code are counted on their own lists.
How can I contact internists in Massachusetts?
Dmand AI finds validated work emails, mobile numbers and practice phone numbers for internists in Massachusetts through healthcare waterfall enrichment, matched to the site where each one practices now. They are available with a free Dmand AI account: 30 days free, self-serve, no credit card.
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Search 6,731 Massachusetts internists by hospital, medical group and the EHR they use, with validated work emails and mobile numbers.
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