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 73 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. Alice Ling, MDLanesboro, MA 012371730146358
  2. Mara Linscott, MDKingston, MA 023641457458614
  3. Amy Linsky, MDBoston, MA 021301811051154
  4. Marine Lipartia, MDFramingham, MA 017021578730032
  5. Jamie LipmanCambridge, MA 021391639356850
  6. Mark Liponis, M.D.Lenox, MA 012401679616452
  7. Marvin Lipschutz, M.D.Weymouth, MA 021901821060484
  8. Lewis Lipsitz, M.D.Boston, MA 021311619917143
  9. Elliot Lipstock, MDFairhaven, MA 027191962462028
  10. Anne Lipton, M.D.Fitchburg, MA 014201902838170
  11. Vladas Litani, MDSouthbridge, MA 015501528072360
  12. Jessica Little, MDBoston, MA 021151417486770
  13. Juan Litvan, MDNew Bedford, MA 027401609033604
  14. Bing Liu, M.D.N Dartmouth, MA 027471699745810
  15. Howard Liu, MDBrighton, MA 021351790700276
  16. James Liu, M.D.Somerville, MA 021441114983533
  17. Jia LiuCambridge, MA 021411063857969
  18. Joyce Liu, MDCharlestown, MA 021291144395179
  19. Lily Liu, M.D.Cambridge, MA 021381245435163
  20. Minping Liu, M.D.Boston, MA 021111417966557
  21. Shiying Liu, MDBoston, MA 021141760991939
  22. Tonia LiuBoston, MA 021111073451811
  23. Zhiyu Liu, MDSpringfield, MA 011071679291520
  24. Zhuo Liu, M.D.Boston, MA 021151245680115
  25. Amanda Livingston, MDCambridge, MA 021381043448210
  26. Anna Livson, M.D.Billerica, MA 018211902845993
  27. Teresa Llorens, M.D.Rowley, MA 019691861643769
  28. Amy Lo, M.D.Acton, MA 017201174783526
  29. Elizabeth Lo, M.D.Burlington, MA 018031598981060
  30. Kevin Bryan Lo, M.D.,Boston, MA 021151225480916
  31. Marissa Lobl, MDFramingham, MA 017021376234724
  32. Jane Lochrie, MDWorcester, MA 016081306812391
  33. Bruce Lockhart, M.D.Springfield, MA 011041255375630
  34. Sheldon Lockman, M.D.Dorchester Center, MA 021241245229392
  35. Elizabeth Loder, MDBoston, MA 021141881684157
  36. Matthew Loew, M.D.Attleboro, MA 027031730159187
  37. Hui-Shien Loh, MDWatertown, MA 024721619937117
  38. Diane London, M.D.Needham, MA 024921629017710
  39. Paul Long, MDBoston, MA 021181225473226
  40. David Longworth, MDBurlington, MA 018031811092869
  41. Robert Lonigro, MDMarshfield, MA 020501477514545
  42. Timothy Loo, M.D.Boston, MA 022151871584813
  43. Sandra Looby-Gordon, M.D.Boston, MA 021181972549343
  44. John Joseph Looney, M.D.Milton, MA 021861003848532
  45. Emily Lopes, MDBoston, MA 021141669885737
  46. Laercio Lopes Da Silva, MDFramingham, MA 017021376105759
  47. Anthony Lopez, M.D.Newburyport, MA 019501770541815
  48. Lenny Lopez, MD MDIVBoston, MA 021201184637399
  49. Mario Lopez, MD, PHDBedford, MA 017301720043102
  50. Richard Lopez, M.D.Medford, MA 021551568428985

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.