NPPES file of Aug 9, 2026

Hematology & Oncology Physician in Massachusetts

461 NPPES records list hematology & oncology physician with a practice address in Massachusetts, 6.6 per 100,000 residents, the 3rd highest rate of 51. Boston and Worcester have the most; each record links to the provider's NPI and the Massachusetts license search. Page 8 of 10.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207RH0003X · 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, 235

  1. Boston235
  2. Worcester46
  3. Springfield18
  4. Cambridge12
  5. Burlington9

Hematology & Oncology Physician records in Massachusetts

  1. Sherin Rouhani, MD PHDBoston, MA 021141164879730
  2. Susan Sajer, M.D.Concord, MA 017421154304251
  3. Bachir Sakr, MDSpringfield, MA 011071538213483
  4. Tony Samaha, MDWorcester, MA 016081891767208
  5. Jacob Sands, MDBurlington, MA 018051356491237
  6. Ariana Santopietro, MDBoston, MA 022151104310846
  7. Pedro Sanz-Altamira, M.D.Lawrence, MA 018411326021429
  8. Philip Saylor, M.D.Boston, MA 021141902820384
  9. David Scadden, MDBoston, MA 021141609829852
  10. Karen Scanlan, M.D.Norwood, MA 020621639176662
  11. Ilana Schlam CamhiBoston, MA 021111760862973
  12. Benjamin Schlechter, MDBoston, MA 022151679745186
  13. Lowell Schnipper, M.D.Boston, MA 022151861414278
  14. Susan SchumerNewton, MA 024621104934926
  15. Kala Seetharaman, MDWorcester, MA 016081710969050
  16. Kartik Sehgal, MDBoston, MA 022151699188573
  17. Christopher Seidler, MDSouthbridge, MA 015501497729347
  18. Sonia Seng, MDFall River, MA 027201366629719
  19. David Sermer, M.D.Boston, MA 022151629496328
  20. Maitreyi Sharma, M.D.Boston, MA 022151174570543
  21. Iris Sheng, M.D.Cambridge, MA 021381578942058
  22. David Shepro, MDHolden, MA 015201912980947
  23. Geoffrey Sherwood, M.D.Boston, MA 021301063490431
  24. Reve Shields, MDSouth Weymouth, MA 021901871719187
  25. Shai Shimony, MDBoston, MA 022151184394868
  26. Margaret Shipp, MDBoston, MA 021151699851154
  27. Mark Shparber, M.D.Fall River, MA 027201982614160
  28. Sudeep Siddappa Malleshappa, M.D.,Springfield, MA 011071073928784
  29. Ahmad Siddiqui, MDNorthampton, MA 010601700873783
  30. Justin Simmons, M.D.Boston, MA 022151588807382
  31. Natalie SinclairMilford, MA 017571740315654
  32. Prabhsimranjot Singh, MDBoston, MA 022151003106220
  33. Robert Sokolic, M.D.Boston, MA 021301346482742
  34. George Sorescu, MDBrockton, MA 023011861675167
  35. Jacob Soumerai, MDBoston, MA 021141972897908
  36. Jesse Spector, M.DPittsfield, MA 012011598737231
  37. Paul Spieler, M.D.Haverhill, MA 018301972586907
  38. David Spriggs, MDBoston, MA 021141023104353
  39. Zsofia Stadler, M.D.Boston, MA 021151154511251
  40. Andrew Staron, M.D.Boston, MA 021181144616533
  41. David Steensma, M.D.Boston, MA 021151972575942
  42. David Steinberg, MDBurlington, MA 018051336204056
  43. Jennifer Stone, M.D.Ayer, MA 014321770672347
  44. Richard Stone, MDBoston, MA 021151528036894
  45. Keith Stuart, MDBoston, MA 022151205867108
  46. Joan Sully, NPBoston, MA 022151114056207
  47. Jiyuan SunBoston, MA 021111245658392
  48. Tilak Sundaresan, M.D.Boston, MA 021141114252707
  49. Tamara Sussman, M.D.Boston, MA 022151427445097
  50. Sakiko Suzuki, M.D.Worcester, MA 016551700028826

Source: CMS NPPES, primary taxonomy 207RH0003X: records by practice city and the list of records, file of Aug 9, 2026.

Massachusetts ranks 3 of 51 per resident

  1. District of Columbia11.9
  2. Rhode Island8.0
  3. Massachusetts6.6
  4. Washington6.1
  5. Pennsylvania6.0
  6. 50 states and D.C.4.2

Source: CMS NPPES, primary taxonomy 207RH0003X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

75.1% of these records appear in a Medicare file, against 82.9% 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. Massachusetts75.1%
  2. United States82.9%

Hematology & Oncology Physician records in Massachusetts, measured

  • In a Medicare file346 of 461 · 75.1% here, 82.9% nationally
  • In the CMS Doctors and Clinicians file304 · 65.9% here, 71.3% nationally
  • Not updated in five years or more285 · 61.8% here, 54.3% nationally
  • Median graduation year2004 · the 303 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207RH0003X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

461 NPPES records list hematology & oncology physician (207RH0003X) as their primary taxonomy with a practice address in Massachusetts: 6.6 per 100,000 residents against 4.2 nationally (50 states and D.C.). Boston has 235 of them (51%).

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. Washington476
  2. North Carolina431
  3. Ohio513
  4. New Jersey399

States with a similar rate per 100,000

  1. Pennsylvania6.0
  2. New York5.9
  3. Maine5.5
  4. Connecticut5.5

The largest states

  1. California1,583
  2. New York1,163
  3. Texas922
  4. Florida818
  5. Pennsylvania784

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.