NPPES file of Aug 9, 2026

Physician Assistant in Massachusetts

4,713 NPPES records list physician assistant with a practice address in Massachusetts, 67 per 100,000 residents, the 12th highest rate of 51. Boston and Worcester have the most; each record links to the provider's NPI and the Massachusetts license search. Page 74 of 95.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 363A00000X · 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, 1,660

  1. Boston1,660
  2. Worcester425
  3. Springfield172
  4. Burlington154
  5. Cambridge99

Physician Assistant records in Massachusetts

  1. Catherine Ribeiro, PA-CNew Bedford, MA 027401043597339
  2. Kathleen Ribezzo, PA-CWorcester, MA 016081336381888
  3. Sonnly Ribourg, PAMalden, MA 021481154739241
  4. Mariessa Ricciardi, PA-CWorcester, MA 016081457090839
  5. Katherine Rice, PA-CEast Longmeadow, MA 010281871114199
  6. Sarah Rice, PAWaltham, MA 024511396147856
  7. Timothy Rice, PA-CSpringfield, MA 011071831102110
  8. Cara RichardsBoston, MA 021151003163965
  9. Julianne Richards, PA-CBoston, MA 021151730634940
  10. Kelvey RichardsAndover, MA 018101164039749
  11. Michael Richards, PAAuburn, MA 015011912985995
  12. Anne Richardson, PA-CScarborough, MA 040741376821363
  13. Courtney Richardson, PA-CWareham, MA 025711922710615
  14. Drew RichardsonWestfield, MA 010851699628883
  15. Matthew RichardsonWorcester, MA 016081649952037
  16. Tierney Richardson, PA-CFoxboro, MA 020351891220927
  17. Emma Richert, PA-CBoston, MA 021141760206445
  18. Glenn Richmond, PA-CBoston, MA 021151487742458
  19. Stephen Richmond, PAEast Boston, MA 021281205976974
  20. Michelle Ricker, PACBelchertown, MA 010071659424869
  21. Rebecca RideoutLowell, MA 018541073993440
  22. Lauren RidleyBoston, MA 021151356095673
  23. Anne Riemer, PA-CChelmsford, MA 018241447447990
  24. Brendan RileyWeymouth, MA 021901316585615
  25. Shannon RileyBoston, MA 021141174349351
  26. Jamie Rinaldi, PA-CWorcester, MA 016551215765052
  27. Sarah Rindner, PAPeabody, MA 019601154556371
  28. Jennifer Ring, P.A.-C, MSFairhaven, MA 027191184760696
  29. Jacob Rinkacs, PABrighton, MA 021351124790316
  30. Nicole Rinn, PA-CS Weymouth, MA 021901396236543
  31. Natasha Rinnig, PA-CBoston, MA 021151023971819
  32. Michael Riordan, PA-CPittsfield, MA 012011629774195
  33. Rachael Risman, PA-CBoston, MA 021111609409135
  34. Keith Ritchie, P.A.South Yarmouth, MA 026641104390921
  35. Sara Ritchie, PA-CWorcester, MA 016051871173781
  36. Moriah Ritson, PHYSICIAN ASSISTANTNew Bedford, MA 027401841232303
  37. Madeleine Rivard, PANorwood, MA 020621306129788
  38. Kimberly Rivera, PA-CBoston, MA 021271437709458
  39. Nikolas Rivera, PABoston, MA 022151861136186
  40. Merjem Rizvancevic, PAEverett, MA 021491306674965
  41. Caroline RizzoBoston, MA 021141437742269
  42. Sarah Rizzo, PA-CPeabody, MA 019601457746182
  43. Jennifer Roache, PA-CWellesley, MA 024811346665148
  44. Alison Robbins, PA-CWinchester, MA 018901265741722
  45. Donna Robbins, PADedham, MA 020261689895260
  46. Ashley Roberge, PA-CAmherst, MA 010021841081874
  47. Joshua RobertAgawam, MA 010011467195420
  48. Catherine RobertsBoston, MA 022151386294296
  49. Connor Roberts, PA-CBoston, MA 021141831933308
  50. Kristen Roberts, PA-CBoston, MA 021151013732437

Source: CMS NPPES, primary taxonomy 363A00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 12 of 51 per resident

  1. Nebraska68
  2. New Hampshire68
  3. Delaware67
  4. Massachusetts67
  5. West Virginia65
  6. Colorado64
  7. 50 states and D.C.49

Source: CMS NPPES, primary taxonomy 363A00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

77.6% of these records appear in a Medicare file, against 77.9% 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. Massachusetts77.6%
  2. United States77.9%

Physician Assistant records in Massachusetts, measured

  • In a Medicare file3,659 of 4,713 · 77.6% here, 77.9% nationally
  • In the CMS Doctors and Clinicians file3,220 · 68.3% here, 62.6% nationally
  • Not updated in five years or more1,780 · 37.8% here, 39.3% nationally
  • Median graduation year2019 · the 3,217 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 363A00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

4,713 NPPES records list physician assistant (363A00000X) as their primary taxonomy with a practice address in Massachusetts: 67 per 100,000 residents against 49 nationally (50 states and D.C.). Boston has 1,660 of them (35%).

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. Georgia4,662
  2. Illinois4,926
  3. Virginia4,408
  4. Ohio5,325

States with a similar rate per 100,000

  1. Delaware67.4
  2. New Hampshire67.5
  3. Nebraska68.3
  4. Michigan69.6

The largest states

  1. New York15,555
  2. California14,451
  3. Texas10,999
  4. Florida10,257
  5. North Carolina9,279

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.