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 19 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. Frank Carbone, M.D.Beverly, MA 019151114027794
  2. Paula Jo Carbone, M.D.,M.B.A.Sudbury, MA 017761942318449
  3. Roberto Carcamo-Sanabria, MDFitchburg, MA 014201841308616
  4. Laura Cardenas Ramos, MDFall River, MA 027231225602766
  5. Sandra Cardenas Villa, MDLawrence, MA 018411770642142
  6. Melanie Cardoza, DOFall River, MA 027211427007921
  7. Jose Cariz, MDMattapan, MA 021261396733838
  8. Paul Carlan, M.D.Greenfield, MA 013011770582603
  9. Narath Carlile, MDBoston, MA 021151841428224
  10. Claire Carlo, M.D.Boston, MA 021181336125871
  11. David Carlson, M.D.Milford, MA 017571871695296
  12. Jeanine Carlson, M.D.Boston, MA 021111588603013
  13. Karen Carlson, MDBoston, MA 021141104809565
  14. Laura Carman, MDWinchester, MA 018901831264027
  15. Paula Carmichael, MDWorcester, MA 016051336103860
  16. Matthew Carmody, MDCambridge, MA 021381184624488
  17. Dana Carne, MD, MBABoston, MA 021141407176977
  18. Henry Carnes, DOBoston, MA 021141609459403
  19. Jesus Caro, M.D.Lexington, MA 024201124086145
  20. Jose CaroBoston, MA 021151881612307
  21. Lela Caros, M.D.Boston, MA 021141003899519
  22. Audrey Carr, MDBoston, MA 022151700346020
  23. Jayson Carr, M.D.Brookline, MA 024461780611798
  24. Phyllis Carr, M.D.Boston, MA 021181841255486
  25. Steven Carr, M.D.Boston, MA 021361447208335
  26. Joaquin Carral, M.D.Greenfield, MA 013011285949735
  27. Yoel Carrasquillo Vega, M.D.Worcester, MA 016551760821094
  28. Luis Carreiro, M.D.Franklin, MA 020381356372395
  29. John Carroll, M.D.Malden, MA 021481376511717
  30. Niamh Carroll, M.D.Boston, MA 021111023149069
  31. Mollie Carruthers, MDBoston, MA 021141508025958
  32. Robert Carruthers, MDBoston, MA 022151326207754
  33. Julia Carson, D.O.S Yarmouth, MA 026641548279953
  34. Helen Carter, M.D.Amesbury, MA 019131710916036
  35. James Carter, M.D.Boston, MA 022151518051531
  36. Jocelyn Carter, M.D.Boston, MA 021141184730103
  37. Marcy Carty, MD, MPHBoston, MA 021151326038928
  38. Michael Carty, MDCambridge, MA 021381467465583
  39. Tricia Carty, MDFall River, MA 027211053308171
  40. Jorge Casal, M.D.Boston, MA 021141114976396
  41. Maria Casal, M.D.Worcester, MA 016051609859503
  42. Jean Casello, MDShrewsbury, MA 015451821010778
  43. James Casey, MDBrighton, MA 021351861505976
  44. Brian Casserly, MDReading, MA 018671366516080
  45. Peter Castaldi, M.D.Boston, MA 021111902891062
  46. Emily CasteenBoston, MA 021111215875570
  47. Matilde Castiel, M.D.Worcester, MA 016101871576785
  48. Thomas Castiglione, M.D.Kingston, MA 023641770553539
  49. Ana Maria Castrillon, MDHolyoke, MA 010401932174570
  50. Cristina Castro-Rivera, MDPHDBoston, MA 022151336723204

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.