NPPES file of Aug 9, 2026

Medical Oncology Physician in Massachusetts

421 NPPES records list medical oncology physician with a practice address in Massachusetts, 6 per 100,000 residents, the 1st highest rate of 51. Boston and Weymouth have the most; each record links to the provider's NPI and the Massachusetts license search. Page 5 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RX0202X · 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, 341

  1. Boston341
  2. Weymouth10
  3. Burlington9
  4. Springfield9
  5. Cambridge7

Medical Oncology Physician records in Massachusetts

  1. Jacob Laubach, M.D.Boston, MA 021151922086487
  2. Donald Lawrence, MDBoston, MA 021141639181613
  3. Kathleen Leahy, M.D., MPHWeymouth, MA 021901275913014
  4. Daniel Lee, M.D., PHDWorcester, MA 016051023175593
  5. Richard Lee, MD PHDBoston, MA 021141871583096
  6. Mark Leick, MDBoston, MA 021141912325143
  7. Jack Leitner, MDFramingham, MA 017021205975067
  8. Jose Leone, M.D.Boston, MA 022151659532703
  9. Adam Lerner, M.D.Boston, MA 021181063460087
  10. James Liebmann, MDWorcester, MA 016551477556587
  11. Jennifer Ligibel, MDBoston, MA 021151760459341
  12. Elgene Lim, M.D.Boston, MA 024461073817524
  13. Sewanti Limaye, M.D.Boston, MA 021151487803797
  14. Jessica Lin, M.D.Boston, MA 021141528320975
  15. Robert Lindsley, MD, PHDBoston, MA 022151104085554
  16. David Liu, MDBoston, MA 022151740501519
  17. Geoffrey Liu, MDBoston, MA 021141215928452
  18. Yuxin Liu, M.D.Boston, MA 022151346776143
  19. Maxwell Lloyd, MDBoston, MA 021141427671320
  20. Dan Longo, M.D.Brookline, MA 024451790842664
  21. Jaclyn LopiccoloBoston, MA 022151396276820
  22. David Lovett, MDHyannis, MA 026011790753283
  23. Ante Lundberg, MDBoston, MA 021301518996396
  24. Jia Luo, MDBoston, MA 022151093133811
  25. Marlise Luskin, M.D.Boston, MA 021151952538639
  26. Filipa Lynce, M.D.Boston, MA 022151144451261
  27. Grace Makari-Judson, MDSpringfield, MA 011071003834920
  28. Charlene Mantia, M.D.Boston, MA 022151831503218
  29. Christopher Manz, M.D.Boston, MA 022151871853432
  30. Asaf Maoz, M.D.Boston, MA 022151770024929
  31. Enrica Marchi, M.D, PH. D.Boston, MA 022151164769881
  32. Eric Marks, M.D.Boston, MA 021181952729717
  33. Jennifer Marks, MDBoston, MA 022151063915817
  34. Zubeena Mateen, M.D.Holyoke, MA 010401568409662
  35. Paul Mathew, M.D.Boston, MA 021111447341284
  36. Ursula Matulonis, MDBoston, MA 021151992870638
  37. Erica Mayer, MD MPHBoston, MA 022151336121789
  38. Robert Mayer, MDBoston, MA 022151659361327
  39. Steven McAfee, MDBoston, MA 021141588647945
  40. Joyce McCaffrey, M.D.Burlington, MA 018051255497418
  41. Bradley McGregor, MDBoston, MA 022151902018559
  42. K. Robert McIntire, M.D.Mashpee, MA 026491417078569
  43. Robert McNamee, M.D.Taunton, MA 027801033190343
  44. Arielle Medford, MDBoston, MA 021141861732638
  45. Saleem Meerani, M.DBurlington, MA 018051386050938
  46. Matthew Meizlish, MD, PHDBoston, MA 022151952988263
  47. Ross Merkin, MDBoston, MA 021141295181998
  48. Reid Merryman, MDBoston, MA 022151568800605
  49. Wilson Mertens, M.D.Springfield, MA 011071427016484
  50. Otto Metzger, M.D.Boston, MA 022151275875155

Source: CMS NPPES, primary taxonomy 207RX0202X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 1 of 51 per resident

  1. Massachusetts6.0
  2. District of Columbia4.3
  3. Maryland3.6
  4. 50 states and D.C.1.7

Source: CMS NPPES, primary taxonomy 207RX0202X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

76.5% of these records appear in a Medicare file, against 81.8% 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. Massachusetts76.5%
  2. United States81.8%

Medical Oncology Physician records in Massachusetts, measured

  • In a Medicare file322 of 421 · 76.5% here, 81.8% nationally
  • In the CMS Doctors and Clinicians file291 · 69.1% here, 72.5% nationally
  • Not updated in five years or more215 · 51.1% here, 49.3% nationally
  • Median graduation year2007 · the 291 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RX0202X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

421 NPPES records list medical oncology physician (207RX0202X) as their primary taxonomy with a practice address in Massachusetts: 6 per 100,000 residents against 1.7 nationally (50 states and D.C.). Boston has 341 of them (81%).

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. California447
  2. Texas547
  3. New York548
  4. Florida561

States with a similar rate per 100,000

  1. District of Columbia4.3
  2. Maryland3.6
  3. Minnesota2.8
  4. Connecticut2.7

The largest states

  1. Florida561
  2. New York548
  3. Texas547
  4. California447
  5. Pennsylvania265

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.