NPPES file of Aug 9, 2026

Rheumatology Physician in Massachusetts

343 NPPES records list rheumatology physician with a practice address in Massachusetts, 4.9 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 7 of 7.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RR0500X · 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, 145

  1. Boston145
  2. Worcester42
  3. Cambridge16
  4. Burlington11
  5. Fall River7

Rheumatology Physician records in Massachusetts

  1. Derrick Todd, M.D., PH.D.Jamaica Plain, MA 021301083682058
  2. Gunnar TomassonBoston, MA 021181417124785
  3. Francine Ton Nghiem, MDCambridge, MA 021381902862451
  4. William Traverse, M.D.Worcester, MA 016051760599971
  5. David Trentham, M.D.Boston, MA 022151043325947
  6. Hung Trinh, MDWorcester, MA 016061407274129
  7. Marcin Trojanowski, MDBoston, MA 021181730348111
  8. Ann Trout, M.D.Hyannis, MA 026011427095553
  9. George Tsokos, M.D.Boston, MA 022151508884024
  10. Sebastian Unizony, MDBoston, MA 021141821227745
  11. Katherine Upchurch, M.D.Worcester, MA 016051023092327
  12. Antonio Valentin, MDSpringfield, MA 011071124238985
  13. Ritu Valiyil, M.D.Boston, MA 022151487662151
  14. Ana Valle, MDBoston, MA 021151093275802
  15. Athanasios Vassilopoulos, MDBoston, MA 021151194415927
  16. Sreekala Vasudevan, M.DAttleboro, MA 027031215041975
  17. Steven Vlad, M.D.Boston, MA 021111275546814
  18. Zachary Wallace, M.D.Boston, MA 021141548580913
  19. Zandra Walton, MD-PHDBoston, MA 021141386103372
  20. Kevin Wei, M.D., PH.DBoston, MA 021151114212263
  21. Pablo Weilg, MDBoston, MA 021181588150742
  22. Michael Weinblatt, MDBoston, MA 021151487768081
  23. Philip Weinstein, MDNorwood, MA 020621205833282
  24. Alice Williams, MDLeominster, MA 014531184670861
  25. William Winchell, MDNewton, MA 024621831169531
  26. Jennifer Winslow, DOPalmer, MA 010691477972701
  27. Eileen Winston, MDFramingham, MA 017021639134133
  28. Jeffrey Wohlgethan, MDBoston, MA 021301457374969
  29. Gary Wolf, MDWorcester, MA 016051952331506
  30. Amy Wu, M.D.Somerville, MA 021441891958831
  31. Peggy Wu, M.D.Worcester, MA 016051366608259
  32. Jason YangWorcester, MA 016051003445164
  33. Nicole Yang, MDBoston, MA 021151144661505
  34. Weihong Yang, M.D.Burlington, MA 018051619119047
  35. Janeth Yinh, M.D.Boston, MA 021111316956451
  36. Laura Yockey, MD, PHDBoston, MA 021141992331839
  37. Chio Yokose, M.D.Boston, MA 021141295145811
  38. Robert Yood, MDWorcester, MA 016061013983006
  39. Michael York, MDBoston, MA 021181851388755
  40. Mark Yun, MDSturbridge, MA 015661326538687
  41. Richard Zamore, M.D.Burlington, MA 018051982040630
  42. Richard Zangara, M.D.Lexington, MA 024211447344940
  43. Robert Zurier, M.D.Worcester, MA 016551598746653

Source: CMS NPPES, primary taxonomy 207RR0500X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia8.4
  2. Massachusetts4.9
  3. New Hampshire4.1
  4. Connecticut4.0
  5. 50 states and D.C.2.4

Source: CMS NPPES, primary taxonomy 207RR0500X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

73.5% of these records appear in a Medicare file, against 81.6% 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. Massachusetts73.5%
  2. United States81.6%

Rheumatology Physician records in Massachusetts, measured

  • In a Medicare file252 of 343 · 73.5% here, 81.6% nationally
  • In the CMS Doctors and Clinicians file212 · 61.8% here, 69.5% nationally
  • Not updated in five years or more214 · 62.4% here, 56.6% nationally
  • Median graduation year2004 · the 212 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RR0500X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

343 NPPES records list rheumatology physician (207RR0500X) as their primary taxonomy with a practice address in Massachusetts: 4.9 per 100,000 residents against 2.4 nationally (50 states and D.C.). Boston has 145 of them (42%).

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. Illinois340
  2. Ohio289
  3. Pennsylvania413
  4. New Jersey253

States with a similar rate per 100,000

  1. New Hampshire4.1
  2. Connecticut4.0
  3. Maryland3.5
  4. New York3.1

The largest states

  1. California926
  2. New York599
  3. Texas545
  4. Florida494
  5. Pennsylvania413

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.