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 75 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. Katarina Luptakova, M.D.Boston, MA 021351033137559
  2. Adam Lurie, M.D.Newton, MA 024621215257977
  3. Andrew Luster, MD PHDBoston, MA 021141043292071
  4. Jay Luthar, M.D.Boston, MA 021111124552567
  5. Kyaw Lwin, MD, MPHDorchester Center, MA 021241972767671
  6. Alexander Ly, D.OSpringfield, MA 011991710369798
  7. Dan Ly, MDWest Roxbury, MA 021321528320058
  8. David Lyczkowski, M.D.Boston, MA 021141942437496
  9. Sarah Lynaugh, MDLongmeadow, MA 011061205840931
  10. Timothy Lynch, MDNorwell, MA 020611891720892
  11. Helen LyoBoston, MA 021181609336676
  12. Sheldon Lyons, MDSpringfield, MA 011071811962962
  13. Mario Lysse, MDBelchertown, MA 010071801106059
  14. Judith Lytle, M.D.Boston, MA 021161437106226
  15. Volodymyr Lyubchik, MDWorcester, MA 016081356392641
  16. Mohender Maan, M.D.Melrose, MA 021761053379008
  17. Sheila Macdonnell, M.D.Brighton, MA 021351245227958
  18. Christine Macginnis, D.O.Worcester, MA 016051952382772
  19. Megna Machado, MDWorcester, MA 016081922671874
  20. Karen Macheledt, M.D.Cambridge, MA 021391104985647
  21. Suman Machinani, M.D.Boston, MA 021141053682195
  22. Perla Macip Rodriguez, M.D.Boston, MA 021181285959676
  23. Christopher MackayBoston, MA 022151427614163
  24. Stephen Mackler, M.D.Dartmouth, MA 027471669442745
  25. Merl Macneil, M.D., P.C.Whittinsville, MA 015881023173655
  26. Briain Macneill, MBBCHBoston, MA 021141720055601
  27. William Macomber, MDMarblehead, MA 019451033165717
  28. Aiswerya Madanam Sampath, MDGreenfield, MA 013011770848657
  29. Geeda Maddaleni, MDWorcester, MA 016551396265419
  30. Marian Madden, M.D.Williamstown, MA 012671811097009
  31. Sujata Maddineni, M.D.Worcester, MA 016051891939062
  32. Harika MaddisettyBrighton, MA 021351770333866
  33. Thalia Madera, PAWebster, MA 015701942933254
  34. Mangadhara Madineedi, MD, MSA, FACPBrockton, MA 023011376552901
  35. Raul Madrid-Zepeda, M.D.Boston, MA 021151053725887
  36. Hoyoung MaengFramingham, MA 017021245526086
  37. Patrick MagahisBoston, MA 021151306640669
  38. Louis Maggio, M.DBraintree, MA 021841518929637
  39. Samuel Maghuyop, MDMethuen, MA 018441265648810
  40. Cynthia Maguire, MDWellesley, MA 024811376565275
  41. David Maguire, M.D.Palmer, MA 010691992744999
  42. James Maguire, MDGloucester, MA 019301538111422
  43. Kanika Mahajan, MBBSBoston, MA 021151366187452
  44. Natalya Maharaj, M.D.Springfield, MA 011071649667742
  45. William Maher, M.D.Newton Lower Falls, MA 024621194835637
  46. Stylianos Maheras, MDEast Boston, MA 021281821062621
  47. Julia Maheshwari, MDBoston, MA 021141023499746
  48. Hatem Mahgoub, M.D.Roxbury Crossing, MA 021201932216033
  49. Ahmed Mahmoud, MBCHBBrighton, MA 021351225888290
  50. Mohamed Mahmoud, MDWinchester, MA 018901033191366

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.