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 129 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. Carol Waldmann, MDBoston, MA 021181104834761
  2. Judith Waligunda, M.D.Roxbury Crossing, MA 021201003815150
  3. Bradley Walker, MDBelmont, MA 024781558940650
  4. Brenda Walkey, M.D.Boston, MA 021161720066871
  5. Sierra Wallace, MDBoston, MA 021181134869340
  6. Alexander Walley, M.D.Boston, MA 021181619935400
  7. Joseph Wallins, M.D.Boston, MA 021141215349824
  8. Lake WalshBoston, MA 021181740923606
  9. Thomas Walsh, MDShrewsbury, MA 015451750363081
  10. Lisa Walter, M.D.Natick, MA 017601881783363
  11. David Walton, M.D.Brookline, MA 024451033204250
  12. Aaron WangBoston, MA 021111992508600
  13. Emily Wang, MDSpringfield, MA 011071477119824
  14. Francis Wang, MDWellesley, MA 024811982717344
  15. Helen Wang, MDBoston, MA 021141376524926
  16. Jianfeng Wang, M.D.Cambridge, MA 021381922395664
  17. John Wang, MD, MSDuxbury, MA 023311740499888
  18. Kenneth Wang, M.D.Cambridge, MA 021401992743298
  19. Linghua Wang, MDBurlington, MA 018031043272131
  20. Mowen Wang, MDBrockton, MA 023021376277780
  21. Priscilla Wang, MDBoston, MA 021141528598778
  22. Sally Wang, MDBoston, MA 021151255398814
  23. Sandra Wang, M.D.Cambridge, MA 021381720002512
  24. Tiffany Wang, MDBoston, MA 021181508555285
  25. Xiaohui Wang, M.D. PHD.Reading, MA 018671982862967
  26. Yung-Hsien WangBoston, MA 021151174132567
  27. Yushan Wang, MDBoston, MA 021141366020281
  28. Yuyao Wang, MDWorcester, MA 016051598228330
  29. Zemin WangConcord, MA 017421861029985
  30. Harry Ward, M.D.Quincy, MA 021691861478505
  31. Madeleine Ward, MDSwansea, MA 027771508489840
  32. Heather Wark, MDNorthampton, MA 010601063422749
  33. Paurnima Warke, MDLowell, MA 018541871088476
  34. Ana Sofia Warner, MD,MBABoston, MA 021191104356351
  35. Cheryl Warner, M.D.Medford, MA 021551871541516
  36. Ronald Warner, MDHyde Park, MA 021361558356568
  37. Fatima Warraich, MDSpringfield, MA 011071417417155
  38. Fatima Warraich, MDSpringfield, MA 011071548878770
  39. H Warren, MDBoston, MA 021141346213618
  40. Jason Wasfy, M.D.Boston, MA 021141962607564
  41. Chalita Washington, MDMarlborough, MA 017521275115925
  42. Nathan Wass, M.D.Boston, MA 021141790135606
  43. Caitlyn Wasserman, MDSpringfield, MA 011051184114720
  44. Randall Waterman, M.DHaverhill, MA 018301790773505
  45. Caitlin Waters, MDNorth Chelmsford, MA 018631841600178
  46. Erik Watson, M.D.Attleboro, MA 027031477577799
  47. Didie Watsop, MDNew Bedford, MA 027401215113279
  48. John Watt, MDFalmouth, MA 025401003938838
  49. Jon Way, M.D.Acton, MA 017201366431009
  50. Anne Weaver, M.D.Amherst, MA 010021083612345

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.