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 68 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. Miguel Laforet-Matos, MDAthol, MA 013311992048763
  2. Raul Laguarda, MDNatick, MA 017601427013242
  3. Soowhan Lah, M.D.Boston, MA 021351003128760
  4. Haki Laho, MDRoxbury Crossing, MA 021201639409477
  5. Eric Lai, MDFramingham, MA 017021245914654
  6. Kasey Lai, M.D.Worcester, MA 016051962555904
  7. Yushuan Lai, M.D., PH.D.Worcester, MA 016081548617996
  8. Morris Lainer, MDHolyoke, MA 010401588769996
  9. Ruth Lainez Urrutia, MDWorcester, MA 016051477139277
  10. Jordana Laks, MD, MPHBoston, MA 021181942731765
  11. Srividhya Lakshmanan, M.D.Worcester, MA 016051740505874
  12. Hussain Lalani, MD MPHBoston, MA 021151942703764
  13. Pakin Lalitnithi, M.D.Boston, MA 021351538857545
  14. Mumtu LallaBoston, MA 021111447813399
  15. Francis Lam, M.DBoston, MA 021111376838227
  16. Yun Lam, M.D.Boston, MA 021161134100894
  17. Joseph Lamanna, MDBoxford, MA 019211275878498
  18. John Lamb, M.D.Oak Bluffs, MA 025571679552467
  19. Kathleen Lambert, MDLexington, MA 024201205833555
  20. Kristin Lamontagne, MDNorth Adams, MA 012471174635965
  21. Steven Lamontagne, MDPittsfield, MA 012011245342039
  22. Isabel Lamour, M.D.Quincy, MA 021691730474826
  23. Terra Lampiasi, D.O.Lenox, MA 012401417397803
  24. Ruth Lamprey, MDScituate, MA 020661841277829
  25. Yinan Lan, M.D.Boston, MA 021111609139195
  26. Clare Landefeld, MDBoston, MA 021151144710583
  27. Bruce Landon, M.D.Boston, MA 021151730126780
  28. Andrew Lane, M.D.Natick, MA 017601750516670
  29. Leo Lane, D.O.Methuen, MA 018441770570426
  30. James Lang, M.D.Chelsea, MA 021501528488798
  31. Joshua Lang, M.D.Boston, MA 021151265882625
  32. Benjamin Langager, D.OPittsfield, MA 012011568799104
  33. Fawn Langerman, MDBoston, MA 021111194988287
  34. Olivia Lanna, M.D.Hingham, MA 020431366467953
  35. Katherine Lantsman, M.D.Boston, MA 021161720052475
  36. Don Lapenas, M.D.Southwick, MA 010771073567533
  37. Alan Lareau, M.D.Springfield, MA 011091962441964
  38. Julius Marco Larioza, MDSpringfield, MA 011071881813921
  39. Rajani Larocca, MDCharlestown, MA 021291144204884
  40. Marc Larochelle, M.D.Boston, MA 021181942437611
  41. Joan Larrabee, M.D.Boston, MA 022151679620538
  42. Janet Larson, M.D.Boston, MA 021181831159326
  43. Nicole LarueWellesley, MA 024811457527277
  44. Karl Laskowski, MDJamaica Plain, MA 021301407015845
  45. Karen Lasser, M.D.Boston, MA 021181932235520
  46. Zara Latif, MDBoston, MA 022151558984575
  47. Catherine Lau, MDBoston, MA 022151912174301
  48. Joseph Lau, M.D.Boston, MA 021111699896894
  49. Sandra Lau, MDBoston, MA 021111508205881
  50. Linda Lauretti, M.D.Jamaica Plain, MA 021301053369637

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.