NPPES file of Aug 9, 2026

Internal Medicine Physician in Massachusetts

6,825 NPPES records list internal medicine physician with a practice address in Massachusetts, 97 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 105 of 137.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · 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, 2,320

  1. Boston2,320
  2. Worcester448
  3. Cambridge300
  4. Springfield282
  5. Burlington144

Internal Medicine Physician records in Massachusetts

  1. Clare RonanBoston, MA 021181275037533
  2. Laurence Ronan, MDBoston, MA 021141285624957
  3. Matthew Ronan, MDBoston, MA 022151407176266
  4. Nazanin Ronan, M.D.Sandwich, MA 025631720076466
  5. Jocelyn RondaEverett, MA 021491851684856
  6. Noor Roomi, M.D.Concord, MA 017421255398657
  7. Jatin Roper, M.D.Boston, MA 021111124273461
  8. Alida Rosado Rodriguez, MDAndover, MA 018101255594388
  9. Michael Rosamilia, MDBoston, MA 021151386334613
  10. Maria Rosasco, M.D.Boston, MA 022151780065201
  11. Adam Rose, MDBoston, MA 021181851374359
  12. David Rose, MDBoston, MA 021111124766522
  13. Emily RoseBoston, MA 022151710557442
  14. Jonathan RoseBoston, MA 022151033566682
  15. Katherine Rose, M.D.Boston, MA 021151013237817
  16. Daniel Roseman, M.D.Boston, MA 021181952530032
  17. Bruce Rosen, M.D.Uxbridge, MA 015691427010347
  18. Elizabeth Rosen, M.D.Lexington, MA 024211073049797
  19. Yael Rosen, M.D.Worcester, MA 016551548315427
  20. Brian Rosenberg, MDBurlington, MA 018031417129636
  21. Henry Rosenberg, MDNorthampton, MA 010601801859152
  22. Jacob Rosenberg, MD,PHDBoston, MA 021141275989170
  23. Naomi Rosenberg, MDWestfield, MA 010851699756684
  24. Natalia Rosenberg, MDFramingham, MA 017021598763310
  25. Harold Rosenblatt, M.D.Westfield, MA 010851104969591
  26. Max Rosendoza, MDBoston, MA 021181710563804
  27. Eldad Rosenthal, MDHarwich, MA 026451124036751
  28. James Roseto, M.D.Boston, MA 022151194768531
  29. Calvin Ross, M.D.South Boston, MA 021271326178922
  30. Elizabeth Ross, M.D.Boston, MA 021161952338014
  31. Mitchell Ross, M.D.Boston, MA 022151790134385
  32. Steven Ross, M.D.Mansfield, MA 020481043409451
  33. Susan Dickinson Ross, M.D.Boston, MA 021111659407245
  34. Liliana Rosselli Risal, MDJamaica Plain, MA 021301447215009
  35. Lisa Rotenstein, MDBoston, MA 021151871022780
  36. Elizabeth Roth, M.D.Boston, MA 021141609803410
  37. Jonathan Rothberg, M.D.Medford, MA 021551972582682
  38. Michael Rothberg, M.D.Springfield, MA 011991851359798
  39. Joseph Rothchild, MDBurlington, MA 018031902902505
  40. Lauren Rothkopf, MDBoston, MA 022151639336308
  41. Alan Rottersman, MDBurlington, MA 018051780782516
  42. Liya Roudaia, M.D.Worcester, MA 016551730440652
  43. Anastasios Roumeliotis, MDCambridge, MA 021381578192084
  44. Elizabeth Rourke, M.D.Brookline, MA 024451386625739
  45. Jack Rowe, MDBoston, MA 021141346500394
  46. Olivia Rowse, MDBoston, MA 021181346771227
  47. Ashok Roy, M.D.Cambridge, MA 021391245298637
  48. Bethany Roy, M.D.Boston, MA 022151760801765
  49. Christopher Roy, MDBoston, MA 021151285697755
  50. Donna Roy, M.D.Boston, MA 021111477711059

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 2 of 51 per resident

  1. District of Columbia133
  2. Massachusetts97
  3. Rhode Island94
  4. Connecticut73
  5. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

74.5% of these records appear in a Medicare file, against 78.7% 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. Massachusetts74.5%
  2. United States78.7%

Internal Medicine Physician records in Massachusetts, measured

  • In a Medicare file5,088 of 6,825 · 74.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file4,103 · 60.1% here, 61.4% nationally
  • Not updated in five years or more4,346 · 63.7% here, 55.4% nationally
  • Median graduation year2004 · the 4,103 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

6,825 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in Massachusetts: 97 per 100,000 residents against 44 nationally (50 states and D.C.). Boston has 2,320 of them (34%).

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. Illinois7,238
  2. Pennsylvania7,300
  3. Michigan5,735
  4. Ohio5,277

States with a similar rate per 100,000

  1. Rhode Island94.3
  2. Connecticut72.5
  3. Maryland63.2
  4. Hawaii62.9

The largest states

  1. California17,696
  2. New York12,067
  3. Florida10,151
  4. Texas9,175
  5. Pennsylvania7,300

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.