NPPES file of Aug 9, 2026

Internal Medicine Physician in Massachusetts

6,825 NPPES records list internal medicine physician with a practice address in Massachusetts, 97 per 100,000 residents, the 2nd highest rate of 51. Boston and Worcester have the most; each record links to the provider's NPI and the Massachusetts license search. Page 79 of 137.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Boston has the most, 2,320

  1. Boston2,320
  2. Worcester448
  3. Cambridge300
  4. Springfield282
  5. Burlington144

Internal Medicine Physician records in Massachusetts

  1. Janet Mayne, D.N.P.Wilmington, MA 018871720061161
  2. Denise Mayo, M.D.Wellesley, MA 024811760438170
  3. Cynthia Mazzoni, M.D.Peabody, MA 019601588620892
  4. John Mazzullo, M.D.Boston, MA 021111245324946
  5. Nicholas McAuley, MDConcord, MA 017421144480740
  6. Anne McCaffrey, MDCambridge, MA 021381639149404
  7. Ryan McCaffrey, M.D.Lawrence, MA 018411437416898
  8. Wendy McCallumBoston, MA 021111831501402
  9. Catherine McCann, MDFalmouth, MA 025401376531772
  10. James McCann, MDEast Boston, MA 021281659459287
  11. Jessica McCannon, MDBoston, MA 021141598891277
  12. Darrolyn McCarroll, MDFranklin, MA 020381588655013
  13. Ian McCart, M.D.Cambridge, MA 021411952362907
  14. Kaitlin McCarterBoston, MA 021181629573050
  15. Caroline McCarthy, MDBoston, MA 021111780524686
  16. Daniel McCarthy, M.D.Billerica, MA 018211497792444
  17. Janine McCauley, MDCambridge, MA 021381487656617
  18. Matthew McCauley, D.O.Milford, MA 017571346447430
  19. Bryna McConarty, M.D.Duxbury, MA 023321609078849
  20. Laura McCord, MDWellesley, MA 024821609834381
  21. Danny McCormick, M.D.Cambridge, MA 021391669410890
  22. Ainsley McCowan, M.D.Newton, MA 024621730591504
  23. Roderick McCoy, MD, PHDCambridge, MA 021381235304254
  24. Francis McDermott, MDIpswich, MA 019381972604379
  25. Nicole McDonald, M.D.Fall River, MA 027201992744080
  26. Allison McDonough, MDWaltham, MA 024511124091103
  27. Juhee McDougalBoston, MA 021181851736714
  28. David McDougall, DOSpringfield, MA 011071225007461
  29. Kathleen McFadden, MDBoston, MA 021141265960033
  30. James McGarry, M.D.Braintree, MA 021841023074838
  31. Sarah McGee, M.D.Worcester, MA 016051285617951
  32. Susan McGirr, MDBoston, MA 022151427496959
  33. Maury McGough, MDSalem, MA 019701649226457
  34. Robert McGowen, MDWareham, MA 025711285637405
  35. David McGrath, MDLeeds, MA 010531003879354
  36. Kerri McGrath, MDBoston, MA 021141861529216
  37. Arthur McGuire, M.D.East Longmeadow, MA 010281861522302
  38. Bryan McGuirk, MDNorthborough, MA 015321184988446
  39. Michael McInerney, M.D.Pittsfield, MA 012011215998372
  40. Jane McInerny, M.D.Braintree, MA 021841902051063
  41. Charles McInnis, M.D.Westwood, MA 020901346343969
  42. Kenneth McIntosh, MDBoston, MA 021151881795623
  43. Sylvia McKean, MDBoston, MA 021151316938954
  44. Mary Anne McKendall, MDQuincy, MA 021711679774988
  45. John McKenna, MDWorcester, MA 016051417051715
  46. Margaret McKenna, MDBoston, MA 021181043389638
  47. Anne McKinley, M.D.Chestnut Hill, MA 024671972821262
  48. Renee McKinney, M.D.Chestnut Hill, MA 024671750329041
  49. Anne McKinnon, MDNorthampton, MA 010601255311452
  50. Amanda McLain, MDNewton, MA 024581215183736

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia133
  2. Massachusetts97
  3. Rhode Island94
  4. Connecticut73
  5. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.5% of these records appear in a Medicare file, against 78.7% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Massachusetts74.5%
  2. United States78.7%

Internal Medicine Physician records in Massachusetts, measured

  • In a Medicare file5,088 of 6,825 · 74.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file4,103 · 60.1% here, 61.4% nationally
  • Not updated in five years or more4,346 · 63.7% here, 55.4% nationally
  • Median graduation year2004 · the 4,103 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

6,825 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Massachusetts: 97 per 100,000 residents against 44 nationally (50 states and D.C.). Boston has 2,320 of them (34%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Illinois7,238
  2. Pennsylvania7,300
  3. Michigan5,735
  4. Ohio5,277

States with a similar rate per 100,000

  1. Rhode Island94.3
  2. Connecticut72.5
  3. Maryland63.2
  4. Hawaii62.9

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.