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 6 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. Jeffrey Meyerhardt, MD MPHBoston, MA 021151548238710
  2. Douglas Micalizzi, MD, PHDBoston, MA 021141356604037
  3. Marc Michaelson, MD PHDBoston, MA 021141275523490
  4. James Mier, M.D.Boston, MA 022151265464788
  5. Rebecca Miksad, MDBoston, MA 021181174745103
  6. Brian MillerBoston, MA 022151053601054
  7. Kevin Miller, MD, MSBoston, MA 021141447886312
  8. Peter Miller, M.D.Boston, MA 021141720426281
  9. Clifton Mo, M.D.Boston, MA 022151184827107
  10. Susan Moody, M.D., PH.D.Boston, MA 022151811048333
  11. Jeffrey Morgan, MDBoston, MA 021151497714570
  12. Alicia Morgans, MDBoston, MA 022151417011529
  13. Tarek Mouhieddine, MDBoston, MA 022151831658731
  14. Nikhil Munshi, MDBoston, MA 022151912979212
  15. Christopher Nabel, M.D., PH.D.Boston, MA 021141194106146
  16. Guilherme Nader Marta, MDBoston, MA 022151255105276
  17. Lee Nadler, M.D.Boston, MA 021151821170564
  18. Qiang Nai, MDHarwich, MA 026451194105312
  19. Neela Natarajan, MDBurlington, MA 018051427107010
  20. Larry Nathanson, M.D.Cambridge, MA 021381811944556
  21. Michael Nathenson, M.D.Boston, MA 022151740417468
  22. Lakshmi Nayak, M.D.Boston, MA 022151891953196
  23. Andreea Negroiu, M.D.Boston, MA 021181053596494
  24. Richard Newcomb, MDBoston, MA 021141902326143
  25. John Niedzwicki, M.D.Dartmouth, MA 027471306812367
  26. James O'Leary, M.D.Waltham, MA 024511336371012
  27. James O'Shea, M.D.Worcester, MA 016081962564153
  28. Oreofe OdejideBoston, MA 021151235398488
  29. Temilola Onabanjo, MD, MPHWeymouth, MA 021901073955662
  30. Taylor Ortiz, MDMethuen, MA 018441306065446
  31. Soravis OsataphanBoston, MA 022151164086518
  32. Matthew Oser, M.D./PH.D.Boston, MA 022151720373772
  33. Patrick Ott, MDBoston, MA 022151871792218
  34. Ben OuyangBoston, MA 021141356091896
  35. Geoffrey Oxnard, MDBoston, MA 021181033300157
  36. Diane PaggioliFall River, MA 027211487871927
  37. Leon Pappas, MD, PHDBoston, MA 021141164910519
  38. Aparna Parikh, M.D.Boston, MA 021141154557650
  39. Haeseong Park, MDBoston, MA 022151417118621
  40. Jong Chul Park, M.DBoston, MA 022151336307925
  41. Leroy Parker, MDBoston, MA 022151629046776
  42. Erin Parry, M.D.Boston, MA 022151386914034
  43. Ann Partridge, MD MPHBoston, MA 021151588671762
  44. Anuj Patel, M.D.Boston, MA 022151679721617
  45. Jaymin Patel, MDBoston, MA 022151093967572
  46. Manisha Patel, MDBoston, MA 021141144634825
  47. Jeffrey Patterson-Fortin, M.D., PH.DBoston, MA 022151437544269
  48. Joseph Pearlberg, M.D., PHDBoston, MA 021151164536066
  49. Eirini Pectasides, M.D., PH.D.Boston, MA 022151447484332
  50. Richard Penson, MDBoston, MA 021141447240999

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.