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 132 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. Margaret-Mary Williams, MDBrockton, MA 023011992792055
  2. Prune Williams, M.D.Falmouth, MA 025401689861379
  3. Robert Williamson, MDWilmington, MA 018871821068305
  4. Sara Williford, M.D.Burlington, MA 018031760654982
  5. Andrew Willment, M.D.Hopkinton, MA 017481700223385
  6. Erica Wilson, MDBoston, MA 021141811103658
  7. Michael Wilson, M.D.North Adams, MA 012471811974876
  8. Michael Wilson, M.D.Boston, MA 021141083803282
  9. Samuel Wilson, M.D.Cambridge, MA 021381376637652
  10. Sean Wilson, M.D.Boston, MA 021151275650640
  11. James Wilterding, MDBoston, MA 022151548218100
  12. Than Win, M.D.New Bedford, MA 027401447298054
  13. Elliott Winford, MD, MHSBoston, MA 021141932785078
  14. Jonathan Wing, MDBoston, MA 021141679910806
  15. Christine Winger, M.D.Lexington, MA 024211073616868
  16. Richard Winickoff, MDBoston, MA 021141902897911
  17. Mason WinkieWorcester, MA 016051154062412
  18. Laura WinnerBoston, MA 022151588240386
  19. Julie Winsett, MDNewton, MA 024621336254747
  20. Daniela Winston, M.D.Clinton, MA 015101215984877
  21. Diana Winston-Comartin, M.D.Boston, MA 021111669628590
  22. Kevin WintersBoston, MA 022151568872703
  23. Muhammad Hassaan Wiqar, MDSpringfield, MA 011071548948516
  24. Alfred Wise, M.D.Williamstown, MA 012671225015282
  25. Bram Wispelwey, M.D., M.S.Boston, MA 021151720492069
  26. Cecily Wiswall, MDSpringfield, MA 011091740642909
  27. Daniel Witt, MDWellesley, MA 024811710513510
  28. Steven Witte, MDCambridge, MA 021381407347834
  29. William Wittman, M.D.Falmouth, MA 025401891798724
  30. Robert Witzburg, M.D.Boston, MA 021181164489209
  31. Lynn WiwantoWoburn, MA 018011639707748
  32. Charles Wohl, MD FACPPittsfield, MA 012011932167558
  33. Laurence Wohl, MDBrockton, MA 023021891749669
  34. Raymond WolejkoFitchburg, MA 014201487645495
  35. Heather Wolf, M.D.Watertown, MA 024721841259595
  36. Marshall Wolf, MDBoston, MA 021151891752580
  37. Scott Wolf, DOSpringfield, MA 011041841382975
  38. Tzipora Wolff, MDStoughton, MA 020721992791842
  39. Taylor Wolfgang, MDBoston, MA 021111639660558
  40. Sibylle Wolleb, M.D.Boston, MA 021111518087592
  41. Mae Wolslegel, D.O.Webster, MA 015701356517551
  42. Edward Wong, M.D.Burlington, MA 018031629026356
  43. Jeffrey Wong, M.D., PH.D.Boston, MA 021151043691181
  44. John Wong, MDBoston, MA 021111891887725
  45. Johnson Wong, MDBoston, MA 021141659362820
  46. Joseph Wong, MDCambridge, MA 021381760484976
  47. Madeleine Wong, MDBoston, MA 022151215639125
  48. Thomas Wong, MDActon, MA 017201194715680
  49. Waichi Wong, MDBoston, MA 021141225019342
  50. Barbara Woo, MDBoston, MA 021141770574238

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.