NPPES file of Aug 9, 2026

Gastroenterology Physician in Massachusetts

686 NPPES records list gastroenterology physician with a practice address in Massachusetts, 9.8 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 14 of 14.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RG0100X · 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, 280

  1. Boston280
  2. Worcester50
  3. Burlington31
  4. Springfield18
  5. Cambridge15

Gastroenterology Physician records in Massachusetts

  1. Christopher Ward, MDBurlington, MA 018051891275566
  2. Sharmeel Wasan, MDBoston, MA 021181992729453
  3. Wahid Wassef, M.D.Worcester, MA 016551922080803
  4. James Watson, M.D.Fall River, MA 027201265692784
  5. Horst Weber, MDBoston, MA 021181093787285
  6. Debra Weinstein, MDBoston, MA 021141124028238
  7. Peter Weinstein, M.D.Springfield, MA 011041467410308
  8. Robert WeissHolyoke, MA 010401861575953
  9. Rachel Winter, MDBoston, MA 021151730492216
  10. Bertil Wolf, MDLynn, MA 019041871549535
  11. Jacqueline Wolf, M.D.Boston, MA 022151821077314
  12. Rachel Wolfson, MD PHDBoston, MA 021141174082499
  13. Alan Wong, M.D., M.P.H.Quincy, MA 021691740418466
  14. Danny WongBoston, MA 021151306336755
  15. Michelle Wong, D.O.Fairhaven, MA 027191679912539
  16. Stephen Wright, M.D.Boston, MA 021301407947161
  17. Ramnik Xavier, MDBoston, MA 021141275523359
  18. Xixi XuWorcester, MA 016551811458722
  19. Jay Yamin, M.D.Hyannis, MA 026011285617100
  20. Brian YanBurlington, MA 018051225732209
  21. Rosa Yu, MDBoston, MA 021181932723673
  22. Wankin Yu, MDLeominster, MA 014531477639656
  23. Isabel Zacharias, MDWorcester, MA 016551265603948
  24. Daniel Zandman, M.D.Boston, MA 022151780842955
  25. John Zawacki, M.D.Worcester, MA 016551215910427
  26. Chi Zhang, M.D.North Adams, MA 012471184601007
  27. Wei Zhang, MD. PHDBoston, MA 021141720473523
  28. Xiaocen Zhang, MDBoston, MA 021111336661537
  29. Miguel Zinny, M.D.Brighton, MA 021351487649968
  30. Richard Zirin, M.D.Newburyport, MA 019501548267883
  31. Jaroslav Zivny, M.D.Worcester, MA 016551144203076
  32. Bryan Zoll, MD, MBABoston, MA 022151437619350
  33. Geoffrey Zucker, MDFlorence, MA 010621801867056
  34. Stephen Zucker, M.D.Boston, MA 021151598713711
  35. Samantha Zullow, M.D.Boston, MA 022151558780684
  36. Madan Zutshi, MDEverett, MA 021491699743427

Source: CMS NPPES, primary taxonomy 207RG0100X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia13.1
  2. Massachusetts9.8
  3. Connecticut9.3
  4. New York9.2
  5. 50 states and D.C.6.2

Source: CMS NPPES, primary taxonomy 207RG0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.7% of these records appear in a Medicare file, against 84.4% 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. Massachusetts79.7%
  2. United States84.4%

Gastroenterology Physician records in Massachusetts, measured

  • In a Medicare file547 of 686 · 79.7% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file491 · 71.6% here, 73.7% nationally
  • Not updated in five years or more450 · 65.6% here, 55.6% nationally
  • Median graduation year2004 · the 491 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RG0100X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

686 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Massachusetts: 9.8 per 100,000 residents against 6.2 nationally (50 states and D.C.). Boston has 280 of them (41%).

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. North Carolina681
  2. New Jersey735
  3. Ohio741
  4. Michigan550

States with a similar rate per 100,000

  1. Connecticut9.3
  2. New York9.2
  3. Rhode Island8.8
  4. Maryland8.2

The largest states

  1. California2,140
  2. New York1,797
  3. Florida1,513
  4. Texas1,478
  5. Pennsylvania1,049

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.