NPPES file of Aug 9, 2026

Anesthesiology Physician in Massachusetts

2,089 NPPES records list anesthesiology physician with a practice address in Massachusetts, 30 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 28 of 42.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207L00000X · 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, 1,082

  1. Boston1,082
  2. Worcester146
  3. Westwood105
  4. Burlington81
  5. Springfield74

Anesthesiology Physician records in Massachusetts

  1. Daniel O'Brien, M.D.Fitchburg, MA 014201033144852
  2. Amy O'Brien Charles, MDBoston, MA 021151720440696
  3. Cornelius O'Connor, MDBurlington, MA 018051295831766
  4. Johanna O'Connor, M.D.Westwood, MA 020901558471961
  5. John O'Connor, M.D.Worcester, MA 016551295988921
  6. Joseph O'Dowd, MDBoston, MA 021141447022249
  7. Brian O'Gara, MDBoston, MA 022151609187608
  8. Brian O'HaraBoston, MA 021151619233020
  9. John O'Hara, M.D.Brockton, MA 023021326303124
  10. Timothy O'Malley, MDBoston, MA 021151023696366
  11. Tyler O'Neil, MDSpringfield, MA 011991164087243
  12. Archana O'Neill, MDBoston, MA 021151629059514
  13. James O'Rourke, MDWestwood, MA 020901831175744
  14. Neeru Oberoi, M.D.Worcester, MA 016551679632806
  15. Carlos Ocampo, MDWestwood, MA 020901427034628
  16. Peter Ochieng, M.D.Boston, MA 021141750816963
  17. Samwel Ochieng, MDBoston, MA 021141164046306
  18. Kirsten Odegard, MDBoston, MA 021151912968009
  19. Florence Odutola, M.D.Springfield, MA 011041700990603
  20. David Oh, DOBurlington, MA 018051750910154
  21. Kyung Oh, DO, MSBoston, MA 021141013476860
  22. Oseogie Okojie, MDBrighton, MA 021351023571171
  23. Andrea OliverBoston, MA 021111982308581
  24. Neil Oliwa, MDStoughton, MA 020721407055361
  25. Paul Olson, DOSpringfield, MA 011991427552256
  26. Airadion Omoruan, MDBoston, MA 021141831358449
  27. Kimberly Ona AyalaBoston, MA 022151710515481
  28. Iroso Onamade, M.D.Methuen, MA 018441457513756
  29. Agustin OnetoBoston, MA 021141609526730
  30. Florina Ong, MDBoston, MA 022151033985957
  31. Kah Chuan Ong, MBBSBoston, MA 021141396871034
  32. Jeremiah Onwuzurumba, MDSpringfield, MA 011071639747728
  33. Achikam Oren Grinberg, M.D.Boston, MA 022151134116924
  34. Britlyn Orgill, M.D.Boston, MA 021141679967681
  35. Nancy Oriol, M.D.Boston, MA 021151962449645
  36. Nollag Orourke, MBBCH BAOBoston, MA 021151144205147
  37. Alan Orquiola, MDWorcester, MA 016551346293776
  38. Elindio Ortega, MDBoston, MA 021181457337669
  39. Vilma Ortiz, MDBoston, MA 021141134119449
  40. Jamel Ortoleva, M.D.Boston, MA 021181770846602
  41. Oluwapelumi Osibanjo, M.D.New Bedford, MA 027401073975512
  42. Maciej Osypiuk, M.D.Taunton, MA 027801073671418
  43. Qi Ott, MDSalem, MA 019701326174756
  44. Giselle OuttenSpringfield, MA 011991376118703
  45. Syed M. Khurram Owais, M.D.Boston, MA 021151083096358
  46. Edwin Ozawa, MDBurlington, MA 018051184720658
  47. Meredith Pace, M.D.Burlington, MA 018051780627505
  48. Andrew PadillaBoston, MA 021151477307528
  49. Ruth Padilla-Garcia, MDWestwood, MA 020901407832629
  50. Christy Paiva, M.D.Westwood, MA 020901568625036

Source: CMS NPPES, primary taxonomy 207L00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia47
  2. Massachusetts30
  3. New York26
  4. Oregon23
  5. 50 states and D.C.18

Source: CMS NPPES, primary taxonomy 207L00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

73.3% of these records appear in a Medicare file, against 73.7% 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. Massachusetts73.3%
  2. United States73.7%

Anesthesiology Physician records in Massachusetts, measured

  • In a Medicare file1,532 of 2,089 · 73.3% here, 73.7% nationally
  • In the CMS Doctors and Clinicians file1,475 · 70.6% here, 67.2% nationally
  • Not updated in five years or more1,135 · 54.3% here, 57.8% nationally
  • Median graduation year2008 · the 1,472 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207L00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

2,089 NPPES records list anesthesiology physician (207L00000X) as their primary taxonomy with a practice address in Massachusetts: 30 per 100,000 residents against 18 nationally (50 states and D.C.). Boston has 1,082 of them (52%).

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. Ohio2,068
  2. Michigan1,720
  3. New Jersey1,714
  4. Washington1,701

States with a similar rate per 100,000

  1. New York25.9
  2. Oregon22.9
  3. Wisconsin22.2
  4. Connecticut22.0

The largest states

  1. California7,571
  2. New York5,062
  3. Texas4,635
  4. Florida3,375
  5. Illinois2,575

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.