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 65 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. Caitlyn O'Conor, PA-CBoston, MA 021111437787827
  2. Kathleen O'Dea, P. A. - C.Medford, MA 021551063541928
  3. Kevin O'Donnell, PA-CWellesley, MA 024811144385675
  4. Mary O'Dwyer, PADorchester, MA 021221659930295
  5. Ryan O'Gowan, PA-CBrockton, MA 023021184659385
  6. Daniel O'Grady, PA-CSpringfield, MA 011041043754500
  7. John O'Grady, PA-CWorcester, MA 016551083689020
  8. Breelin O'Hara, PA-CBoston, MA 021151619393246
  9. Elizabeth O'HaraBoston, MA 021151891675393
  10. Seyla O'HearnYarmouth Port, MA 026751366374704
  11. Daniel O'LearyLeominster, MA 014531255778551
  12. Paige O'Loughlin, PA-CBoston, MA 021141386200400
  13. Darren O'MalleyBoston, MA 021151417709007
  14. Tara O'Meara, PHYSICIAN ASSISTANTNewton, MA 024591437543717
  15. Samantha O'Neil, PA-CWorcester, MA 016051659948362
  16. Audra O'NeillBoston, MA 021151235793860
  17. Briana O'NeillBoston, MA 021141245109750
  18. Galen O'NeillBoston, MA 021151447779533
  19. Madison O'Neill, PA-CBurlington, MA 018051487261475
  20. Molly O'Neill, PA-CNewton, MA 024621740993385
  21. Carrie O'Regan, PA-CWellesley, MA 024811982019873
  22. Edward O'Reilly, PACPeabody, MA 019601548653801
  23. Karolina O'Rourke, PABrookline, MA 024461235736448
  24. Michael O'Rourke, PA-CCambridge, MA 021381629528435
  25. Ryan O'Shaughnessy, PA-CBrockton, MA 023021710331095
  26. Sheila O'Shea, PAWorcester, MA 016051255635751
  27. Erin O'Toole, PA-CNorth Grafton, MA 015361679547368
  28. Jason Obey, PABurlington, MA 018051649505793
  29. Megan Oconnor, PABoston, MA 021141033546874
  30. Omorovbiye Odigie, PABrockton, MA 023021215122478
  31. Alyssa Odoardi, PABoston, MA 022151730142480
  32. Carolynn Ohlson, PA-CBoston, MA 022151790211654
  33. Melissa Oikle, PA-CWorcester, MA 016551174619472
  34. Krystin Ojala, MS, PA-C, ATCBoston, MA 021141548520414
  35. Eromosele Okhuebor, PAWorcester, MA 016551356729768
  36. Peace Okoeka, PA-CBoston, MA 021291356112254
  37. Lucky Okojie, PABurlington, MA 018051477008860
  38. Joseph Olandt, PA-CBurlington, MA 018031558153494
  39. Robert Olberg, PA-CEast Longmeadow, MA 010281497327332
  40. Sean Olbert, PA-CNeedham, MA 024941003380973
  41. David Olcott, PA-CAmherst, MA 010031386204428
  42. Kathryn Oldfield, PAGardner, MA 014401699249375
  43. Daniel Olds, PA-CPittsfield, MA 012011871550632
  44. David Olds, PA-CPittsfield, MA 012011720313786
  45. Mariusz Olesiak, PA-CBoston, MA 021181417204496
  46. Amanda Olivas, PA-CBoston, MA 021141336823244
  47. Thayna OliveiraBoston, MA 021151407693443
  48. Alexander Oliver, PA-CBoston, MA 021181023779857
  49. Camille Oliver, PA-CBoston, MA 021151487137717
  50. Erin Oliver, PA-CBoston, MA 022151689779795

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.