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 29 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. Ricardo De Armas, MDBoston, MA 021141558999318
  2. Michael De Bruin, M.D., M.P.H.Worcester, MA 016051780625434
  3. Charles De Guzman, MDBoston, MA 021141134878705
  4. Henriette De La Garza Alvarez, MDFramingham, MA 017021265163463
  5. Denise De Las Nueces, MDBoston, MA 021181689832396
  6. Lauren De Leon, MDFoxborough, MA 020351205154523
  7. Disentuwahandi De Silva, MBBSBoston, MA 021151568755288
  8. Juan De Zengotita, MDBoston, MA 022151851357750
  9. Molly Deakin, DOBoston, MA 021181003498957
  10. Richard Deamicis, M.D.Chelmsford, MA 018241801865233
  11. Edward Dean, MDNorthampton, MA 010601376528638
  12. Kathryn Deanzeris, M.D.Wellesley, MA 024811922056035
  13. Kimberly DebrulerBoston, MA 021141205579802
  14. George Dec, MDBoston, MA 021141063402139
  15. Julien Dedier, MD MPHBoston, MA 021181154386381
  16. Farah DeebaBurlington, MA 018051821409947
  17. David Degrand, M.D.Worcester, MA 016051831174416
  18. David Deitz, MDWestport, MA 027901588682066
  19. Ana Deju-Quevedo, M.D.Pittsfield, MA 012011700040920
  20. Frederick Dekow, M.D.Chelmsford, MA 018241730191503
  21. Carlos Del Rio, M.D.Dracut, MA 018261285608398
  22. Gene Francis Del Rosario, MDClinton, MA 015101023074986
  23. Kevin Delacey, M.D.Auburn, MA 015011447231402
  24. Jessica Delahanty, MDBoston, MA 021281093395006
  25. Kevin Delahanty, M.D.Wareham, MA 025711639272909
  26. Kaitlin Delaney, DOHingham, MA 020431548889090
  27. Tom Delbanco, M.D.Boston, MA 022151790722486
  28. Fabian Delgado, MDFall River, MA 027221629277454
  29. Leyda Delgado, MDNorwell, MA 020611174509004
  30. Claudia Delgado Garrido, MDSalem, MA 019701487398939
  31. Helen Delichatsios, MDBoston, MA 021141366433724
  32. Wyatt Delomba, MDWorcester, MA 016051063090249
  33. Ilham Deloomy, MDBurlington, MA 018031427156405
  34. David Delsesto, D.O.Boston, MA 022101730374398
  35. William Demarco, DOGreat Barrington, MA 012301124103577
  36. Alfred Demaria, M.D.Jamaica Plain, MA 021301558401588
  37. Peter Demartino, M.D.Acton, MA 017201043292360
  38. Michael Dematteo, MDPittsfield, MA 012011851306278
  39. James Demicco, MDNorwood, MA 020621629020433
  40. Udayasena Dendi, M.D.Melrose, MA 021761992968200
  41. Cay Denherder, M.D.Worcester, MA 016051386804961
  42. Christopher Dennis, MDCambridge, MA 021381255362505
  43. Michael DenteBoston, MA 021111548063456
  44. Rohan Deo, MDWorcester, MA 016081538906938
  45. Maria Depina, MDS Weymouth, MA 021901699849208
  46. Deborah Derderian, D.O.Mendon, MA 017561619123205
  47. Denis Derman, M.D.Jamaica Plain, MA 021301366482085
  48. Erin Derose, M.D.Boston, MA 022151013191790
  49. Nichole Derubeis, DOBurlington, MA 018051710547500
  50. Dhruv Desai, MDBoston, MA 021141245867761

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.