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 130 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. Susan Weaver, M.D.Boston, MA 022151073569273
  2. Terry Weaver, M.D.Lenox, MA 012401831390129
  3. Ashley Weber, M.D.Fall River, MA 027201790122851
  4. Eric Weber, MDWest Yarmouth, MA 026731376572966
  5. Sydney Wedmore, MDRockport, MA 019661629060934
  6. Christina Wee, M.D.Boston, MA 022151245381904
  7. Lachelle Weeks, M.D., PH.D.Boston, MA 021151275914533
  8. Eileen Wegener, MDMedford, MA 021551174181630
  9. Christina Wei, M.D.Chelmsford, MA 018241639167257
  10. Nancy Wei, M.D.Boston, MA 021141083740732
  11. Lee Wei JunBoston, MA 021351093551418
  12. Charlene Weigel, MDBoston, MA 021181912115387
  13. Eric Weil, MDRevere, MA 021511891785440
  14. Norman Weinberg, M.D.Lexington, MA 024201548295561
  15. Robert Weinberg, M.D.Quincy, MA 021691326049065
  16. Bradford Weiner, MDNewton, MA 024621295792802
  17. Edward Weiner, MDGreat Barrington, MA 012301083672752
  18. Richard Weiner, MDHalifax, MA 023381649225822
  19. Saul Weingart, MD, PHDBoston, MA 022151316935919
  20. Bruce Weinraub, MDNorthampton, MA 010601447225099
  21. Wayne Weinreb, M.D.North Reading, MA 018641528022621
  22. Yaakov Weinreb, MDBrighton, MA 021351528049400
  23. Amy Weinstein, M.D.Boston, MA 022151669411658
  24. Bruce Weinstein, M.D.Worcester, MA 016551144204694
  25. Bruce Mathew Weinstein, M.D.East Bridgewater, MA 023331396793543
  26. Joseph Weinstein, MDNorth Easton, MA 023561558346031
  27. Michael Weinstein, M.D.Melrose, MA 021761538108626
  28. Robert Weinstein, MDMedford, MA 021551801887831
  29. Zoe Weinstein, MDBoston, MA 021181851682306
  30. Zohar Weinstein, MDCambridge, MA 021381467081307
  31. Lisa Weinstein Moreno, MDMashpee, MA 026491528033305
  32. Clara Weinstock, D.O.Springfield, MA 011071699110197
  33. David Weinstock, DOAuburn, MA 015011447226659
  34. Irving Weintraub, MDCambridge, MA 021391922100890
  35. Rebecca Weintraub, M.D.Boston, MA 021151275689622
  36. Gary Weiser, M.D.Boston, MA 022151730137696
  37. Kipp Weiskopf, M.D., PH.D.Boston, MA 022151164872446
  38. Thomas Weisman, MDFitchburg, MA 014201366433617
  39. Charles Weiss, MDBoston, MA 021141982694493
  40. Edward Weiss, M.D.Boston, MA 021081447285598
  41. Richard Weiss, D.O.Springfield, MA 011041205867850
  42. Scott Weiss, M.D.Boston, MA 021151063555464
  43. Lisa Weissmann, MDCambridge, MA 021391750372306
  44. Daniel Weiswasser, M.D.Agawam, MA 010011437117462
  45. James Weitzman, M.D.Boston, MA 021111447317862
  46. Simon Weitzman, MDNeedham, MA 021921013973775
  47. Sujata Welankiwar, M.D.South Boston, MA 021271881759512
  48. Megan Welch, M.D.Boston, MA 021141861840282
  49. Roy Welker, MDJamaica Plain, MA 021301083671770
  50. Peter Weller, M.D.Boston, MA 022151205860111

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.