NPPES file of Aug 9, 2026

Doctors and health care providers in Boston, MA

41,865 individual NPPES records list a practice address in Boston, 1st of 406 Massachusetts cities. The largest group is students in training: 6,126, 15% of the city's records, against 5% across Massachusetts. Page 290 of 838.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Boston

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Boston in Massachusetts

  • Rank in Massachusetts1st of 406 cities by records
  • Share of the state19.1% of Massachusetts's records
  • Specialties present25 or more taxonomy codes
  • Top three groups24.7% of all records
  • Students in training rank1st of the 10 Massachusetts cities with the most

Compared with Massachusetts as a whole, Boston has 2.9× the state's share of student in an organized health care education/training program records and 0.23× its share of mental health counselor records.

Providers in Boston, alphabetically

  1. Deborah Green-Laroche, MDNeurology Physician1285673343
  2. Hayley Green-Morfesi, MA, MS, CGCGenetic Counselor (M.S.)1235688854
  3. Nathaniel Greenbaum, MDAnesthesiology Physician1952832206
  4. Andrew Greenberg, M.D.Endocrinology, Diabetes & Metabolism Physician1720046956
  5. Donna Greenberg, MDPsychiatry Physician1053301226
  6. Erica GreenbergChild & Adolescent Psychiatry Physician1740505353
  7. James Greenberg, MDObstetrics & Gynecology Physician1962491456
  8. Jeffrey Greenberg, DMDGeneral Practice Dentistry1710248729
  9. Jennifer Greenberg, PSY.D.Clinical Psychologist1871798454
  10. Jillian Greenberg, N.P.Adult Health Nurse Practitioner1386050433
  11. Jonathan Greenberg, PHDStudent in an Organized Health Care Education/Training Program1144727892
  12. Katherine Greenberg, PSYDClinical Psychologist1417565581
  13. Kayla Greenberg, NPPediatric Nurse Practitioner1568713618
  14. Mark Greenberg, PH.D.Clinical Neuropsychologist1417151523
  15. Shaina Greenberg, LCSWClinical Social Worker1376409094
  16. Steven Greenberg, MD PHDNeurology Physician1508847310
  17. Steven Greenberg, MDNeurology Physician1114992831
  18. William Greenberg, M.D.Psychiatry Physician1265481527
  19. Amy GreenblattStudent in an Organized Health Care Education/Training Program1316546849
  20. David Greenblatt, M.D.Clinical Pharmacology Physician1447371695
  21. Wesley Greenblatt, M.D.Pediatrics Physician1679830392
  22. Abigail Greene, MD, PHDStudent in an Organized Health Care Education/Training Program1386348175
  23. Arin Greene, MDSurgery Physician1053385245
  24. Brady Greene, MDPsychiatry Physician1700618758
  25. Briana Greene, RNRegistered Nurse1104633007
  26. Brittany GreeneBehavior Technician1396257051
  27. Denise Greene, R.N.Registered Nurse1942423520
  28. Donna Greene, CRNACertified Registered Nurse Anesthetist1841493418
  29. Marianne GreenePhysician Assistant1710706155
  30. Maya GreeneStudent in an Organized Health Care Education/Training Program1659170348
  31. Meghan GreeneBehavior Technician1821873241
  32. Michael Greene, MDMaternal & Fetal Medicine Physician1376533406
  33. Reginald Greene, MDDiagnostic Radiology Physician1770561391
  34. Rose GreeneSocial Worker1679847669
  35. Ross Greene, PHDPsychiatry Physician1487622155
  36. Sean GreeneStudent in an Organized Health Care Education/Training Program1114259421
  37. Susan Greene, DPTPhysical Therapist1508203704
  38. Susan Greene-Hellman, APRN BCAdult Health Nurse Practitioner1417167479
  39. Robert Greenes, MD PHDDiagnostic Radiology Physician1700861747
  40. Andrea GreenfieldAcute Care Nurse Practitioner1952662637
  41. Daniel Greenfield, RPHPharmacist1255920666
  42. Jules GreenfieldStudent in an Organized Health Care Education/Training Program1669204970
  43. Natalie GreenhalghClinical Social Worker1750188249
  44. Alyssa Greenhouse, MD, MPHInternal Medicine Physician1134605942
  45. Celia Greenlaw, MDStudent in an Organized Health Care Education/Training Program1972139855
  46. Erin Greenler, DPTPhysical Therapist1144352683
  47. Eleanor GreenoughSocial Worker1881520385
  48. Paul Greenough, M.D.Emergency Medicine Physician1902861180
  49. Molly Greenshields, MDStudent in an Organized Health Care Education/Training Program1487113783
  50. Jesse Greenslade, DPTPhysical Therapist1780352641

The largest Massachusetts cities

  1. Worcester13,166
  2. Springfield8,553
  3. Cambridge5,145
  4. Brockton4,287
  5. Milford3,459

All of Massachusetts →

How to read this directory

Boston, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 41,865 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in Boston - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a Boston practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in Boston is weighted toward Student in an Organized Health Care Education/Training Program (6,126 clinicians, followed by Internal Medicine Physician with 2,320 and Clinical Social Worker with 1,906). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to Massachusetts's population, Boston reports roughly 598 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

Of Massachusetts's most common specialties, Counselor is the most prominent one with no provider currently listing a Boston practice address, a coverage gap Boston patients typically fill by traveling to a larger nearby hub.

For Boston patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in Boston, MA?

There are 41,865 registered healthcare providers in Boston, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Boston?

The most common specialties in Boston are Student in an Organized Health Care Education/Training Program, Internal Medicine Physician, Clinical Social Worker, Physician Assistant, Anesthesiology Physician. Student in an Organized Health Care Education/Training Program has the most providers with 6,126.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

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.