NPPES file of Aug 9, 2026

Orthopaedic Surgery Physician in Massachusetts

692 NPPES records list orthopaedic surgery physician with a practice address in Massachusetts, 9.9 per 100,000 residents, the 9th highest rate of 51. Boston and Worcester have the most; each record links to the provider's NPI and the Massachusetts license search. Page 14 of 14.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207X00000X · 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, 265

  1. Boston265
  2. Worcester45
  3. Springfield32
  4. Peabody17
  5. Newton16

Orthopaedic Surgery Physician records in Massachusetts

  1. Fabian Vonknoch, MDBoston, MA 021141932368826
  2. Carley Vuillermin, MBBSBoston, MA 021151689920043
  3. Leonard Wagner, MDSpringfield, MA 011041568457778
  4. Marie Walcott, M.D.Stoneham, MA 021801598991390
  5. Kelly WalshBoston, MA 021151649810136
  6. William Walsh, M.D.Quincy, MA 021711538172549
  7. Ming Wang, M.D.Boston, MA 021151669156154
  8. Daniel Ward, M.D.Chestnut Hill, MA 024671922065820
  9. Jon Warner, MDBoston, MA 021141356326441
  10. Gregory Waryasz, M.D.Boston, MA 021141336469170
  11. Robert Waugh, MDStoneham, MA 021801003950569
  12. Michael Weaver, MDBoston, MA 021151427179993
  13. Alexander Webb, MDBoston, MA 021141174143275
  14. Anthony Webber, MDJamaica Plain, MA 021301225019466
  15. Paul Weitzel, M.D.Waltham, MA 024511235197872
  16. Steven Wenner, M.D.Springfield, MA 011071740207588
  17. Matthew Werger, M.D.Brighton, MA 021351447425038
  18. Andrew White, M.D.Boston, MA 022151013107150
  19. Eric White, M.D.North Adams, MA 012471972540185
  20. Ryan White, MDBoston, MA 021111629839766
  21. Kathryn Whitelaw, MDBoston, MA 021141548889256
  22. Donald Willier, MDBoston, MA 021181619679776
  23. John Willis, MDHyannis, MA 026011548253172
  24. Robert Wilsterman, M.D.Falmouth, MA 025401609804632
  25. David Wing, M.D.Somerville, MA 021451730384314
  26. David Winnick, M.D.Braintree, MA 021841538106737
  27. John Wixted, M.D.Boston, MA 022151306827134
  28. Christopher Worgul, M.D.Concord, MA 017421780034678
  29. James Worthington, MDFall River, MA 027201992804306
  30. W Wu, MDNorth Chelmsford, MA 018631487626545
  31. Peter Yeh, MDWoburn, MA 018011942482237
  32. John Younghein, MDStoneham, MA 021801700204492
  33. Manuel Yvars, M.D.Pittsfield, MA 012011154353670
  34. Joseph Frank Zabilski, M.D.Plymouth, MA 023601710934500
  35. Evan Zahner, MDStoneham, MA 021801154378479
  36. Jay Zampini, M.D.Boston, MA 021151275723314
  37. Symeon Zannikos, M.D.Natick, MA 017601649433665
  38. Dafang Zhang, MDBoston, MA 021151164860243
  39. Connor Ziegler, MDSpringfield, MA 011071174885883
  40. Chason ZiinoBoston, MA 021141033538467
  41. Jeffrey Zilberfarb, M.D.Brookline, MA 024461538183298
  42. John Zimmer, MDBeverly, MA 019151801986203

Source: CMS NPPES, primary taxonomy 207X00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 9 of 51 per resident

  1. Alaska11.3
  2. Minnesota11.3
  3. Wisconsin11.1
  4. Massachusetts9.9
  5. Pennsylvania9.7
  6. Connecticut9.6
  7. 50 states and D.C.7.4

Source: CMS NPPES, primary taxonomy 207X00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

76.0% of these records appear in a Medicare file, against 76.5% 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. Massachusetts76.0%
  2. United States76.5%

Orthopaedic Surgery Physician records in Massachusetts, measured

  • In a Medicare file526 of 692 · 76.0% here, 76.5% nationally
  • In the CMS Doctors and Clinicians file441 · 63.7% here, 62.5% nationally
  • Not updated in five years or more428 · 61.8% here, 56.8% nationally
  • Median graduation year2004 · the 441 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207X00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

692 NPPES records list orthopaedic surgery physician (207X00000X) as their primary taxonomy with a practice address in Massachusetts: 9.9 per 100,000 residents against 7.4 nationally (50 states and D.C.). Boston has 265 of them (38%).

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. New Jersey690
  2. Washington656
  3. Wisconsin656
  4. Minnesota647

States with a similar rate per 100,000

  1. Pennsylvania9.7
  2. Connecticut9.6
  3. Michigan9.6
  4. North Dakota9.4

The largest states

  1. California2,276
  2. Texas1,514
  3. Florida1,470
  4. New York1,339
  5. Pennsylvania1,253

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.