NPPES file of Aug 9, 2026

Gastroenterology Physician in Connecticut

336 NPPES records list gastroenterology physician with a practice address in Connecticut, 9.3 per 100,000 residents, the 3rd highest rate of 51. New Haven and Farmington have the most; each record links to the provider's NPI and the Connecticut license search. Page 7 of 7.

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).

New Haven has the most, 73

  1. New Haven73
  2. Farmington21
  3. Hamden19
  4. Hartford19
  5. Danbury17

Gastroenterology Physician records in Connecticut

  1. Kelly Teagle, D.O.New Milford, CT 067761992095483
  2. Jennifer Thompson, MDHamden, CT 065181013043850
  3. Mae Tighe, M.D.New Haven, CT 065101184765844
  4. Edward Toffolon, M.D.New Britain, CT 060511881689255
  5. Michelle TongTorrington, CT 067901659798023
  6. Brisas Truncali, M.D.Farmington, CT 060321396126637
  7. Renuka Umashanker, MDHamden, CT 065181437130309
  8. Brian Van Linda, MDAvon, CT 060011578540100
  9. Rosalind Van Stolk, MDNew Britain, CT 060511598746463
  10. Benigno VarelaHamden, CT 065181730488412
  11. Haleh Vaziri, MDFarmington, CT 060301336328459
  12. Ronald Vender, MDHamden, CT 065181205817178
  13. Mark Versland, M.D.New Britain, CT 060511639164775
  14. Gracia Viana Rodriguez, M.D.Bridgeport, CT 066101346775434
  15. Gregory WagnerStamford, CT 069021215342423
  16. Stuart Waldstreicher, M.DStamford, CT 069021114913894
  17. Louise Wang, M.D.New Haven, CT 065101043672314
  18. Housein Wazaz, M.D.Meriden, CT 064511629077714
  19. Jeffrey Weiser, MDFarmington, CT 060321437253051
  20. Scott Weiss, M.D.Trumbull, CT 066111134189384
  21. Emily Weng, DOFarmington, CT 060301003311143
  22. Thomas Whelan, M.D..Bethel, CT 068011720043227
  23. Jonathan White, M.D.Meriden, CT 064511598893224
  24. Jonathan Williamson, M.D.Hartford, CT 061061881891703
  25. David Wolfsohn, M.D.New Haven, CT 065101073653705
  26. George Wu, MDFarmington, CT 060301053318345
  27. John Wysocki, MDSouth Windsor, CT 060741457594103
  28. Karen Xiao, MDNew Haven, CT 065101396232922
  29. Joseph Yu, MDBranford, CT 064051346209046
  30. Kirk Zachary, M.D.Norwalk, CT 068511376537563
  31. Alan Zakko, MDNew Haven, CT 065101982194130
  32. Salam Zakko, MDBristol, CT 060101801852934
  33. Anthony Zaldonis, MDAvon, CT 060011144207853
  34. Daniel Zanchetti, M.D.New Haven, CT 065101821257742
  35. Ronald Zlotoff, M.D.Waterbury, CT 067081346229556
  36. Felice Zwas, M.D.Greenwich, CT 068301225059116

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

Connecticut ranks 3 of 51 per resident

  1. District of Columbia13.1
  2. Massachusetts9.8
  3. Connecticut9.3
  4. New York9.2
  5. Rhode Island8.8
  6. 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.

85.7% 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. Connecticut85.7%
  2. United States84.4%

Gastroenterology Physician records in Connecticut, measured

  • In a Medicare file288 of 336 · 85.7% here, 84.4% nationally
  • In the CMS Doctors and Clinicians file255 · 75.9% here, 73.7% nationally
  • Not updated in five years or more231 · 68.8% here, 55.6% nationally
  • Median graduation year2001 · the 255 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

336 NPPES records list gastroenterology physician (207RG0100X) as their primary taxonomy with a practice address in Connecticut: 9.3 per 100,000 residents against 6.2 nationally (50 states and D.C.). New Haven has 73 of them (22%).

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. Colorado334
  2. Wisconsin340
  3. South Carolina303
  4. Indiana372

States with a similar rate per 100,000

  1. New York9.2
  2. Massachusetts9.8
  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.