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 64 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. Sara King, M.D.Boston, MA 021201043446859
  2. Sarah King, MDBrockton, MA 023011720529076
  3. Gurpal Kingra, MDWestfield, MA 010851538199880
  4. Saurav Kini, MBBSBoston, MA 021111932823440
  5. Charles Kinzig, MD, PHDBoston, MA 021151235983263
  6. Jack Kirichian, MDMiddleboro, MA 023461538258199
  7. Navya Kirla, MDCanton, MA 020211285252072
  8. Randi Kirstein, MDDedham, MA 020261538166335
  9. Louis Kishfy, MDCambridge, MA 021381710417217
  10. Anandita Kishore, MDRoxbury, MA 021191245977099
  11. J Kistler, MDBoston, MA 021141386626026
  12. Tatsuyoshi KitamuraDorchester, MA 021241740629682
  13. Jason KittlerPittsfield, MA 012011174585426
  14. Lerzan Kizilay, MDCambridge, MA 021381285617027
  15. Katrina Klaus, D.O.Wellesley, MA 024811295841427
  16. David KleinNeedham, MA 024921174188908
  17. Howard Klein, M.D.Northampton, MA 010601063456325
  18. Isaac Klein, M.D., PH.D.Boston, MA 021151780022269
  19. Johanna Klein, M.D.Brookline, MA 024461144254053
  20. Laurence Klein, MDTurners Falls, MA 013761285621144
  21. Stuart Klein, MDFoxboro, MA 020351275744633
  22. Herbert Kleinman, M.D.Lowell, MA 018521396791125
  23. Marian KlepserBelmont, MA 024781528058211
  24. Sarah KlerBoston, MA 021141366028409
  25. Donald Kleykamp, MDPeabody, MA 019601689662504
  26. Victoria Kliewe, MDBoston, MA 021141235889890
  27. Roger Kligler, MDBrockton, MA 023011578559985
  28. Corrine KlimentBoston, MA 021151801180872
  29. Russell Kling, MDMedfield, MA 020521497168983
  30. Hans-Georg Klingemann, MDBoston, MA 021111679677314
  31. Amanda Klinger, M.D.Boston, MA 022151952781619
  32. Robert Klugman, M.D.Westborough, MA 015811740263417
  33. Hanna Knauss, MDBoston, MA 022151851973754
  34. Michael Kneeland, MDBoston, MA 021351346326352
  35. Erik Knelson, M.D., PH.D.Boston, MA 021151528449717
  36. Helen Knight, MDBoston, MA 021141932565199
  37. Stephen Knight, M.D.Cambridge, MA 021421093752289
  38. Edwin Knights, MDActon, MA 017201801885512
  39. Rachel Knipe, MDBoston, MA 022151093972556
  40. Adrienne Knopf, MDBoston, MA 021141760404883
  41. Clayton Knox, MD, MBABoston, MA 021141609003144
  42. Steven Knuesel, MDBoston, MA 021181760459689
  43. Eric Knutson, MDFitchburg, MA 014201932190691
  44. Bing Ko, M.D., SC.D.Medford, MA 021551053385302
  45. Danielle Ko, MBBSBoston, MA 021141104144385
  46. Kimiyoshi Kobayashi, M.D.Worcester, MA 016551477793487
  47. Rachelle Koch, MDBoston, MA 021111285259598
  48. Sashikanth Kodali, M.D.Beverly, MA 019151598708257
  49. Swati Kodali, M.D.Salem, MA 019701396934667
  50. Tea Kodua, MDGreenfield, MA 013011023290525

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.