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 382 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. Alex Kentsis, MD, PHDPediatrics Physician1235330770
  2. Alicia KenyonStudent in an Organized Health Care Education/Training Program1386347029
  3. Anna Kenyon, RNPediatrics Physician1164353710
  4. Deirdre Keogh, NPAcute Care Nurse Practitioner1548446016
  5. John Keogh, PSY.D.Psychologist1285915843
  6. Ryan Keogh, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1154664670
  7. Emily KeohanePediatric Registered Nurse1104781160
  8. Anya KeomurjianAssistant Behavior Analyst1831868009
  9. William Keough, MDPediatrics Physician1811080013
  10. Elliot KephartRegistered Dietitian1720817315
  11. Lucia Kepler, LMTMassage Therapist1588493704
  12. Lynn Kepnes, NPNurse Practitioner1578657557
  13. Kristopher KeppelStudent in an Organized Health Care Education/Training Program1447957220
  14. Sunny-Skye Keppel, M.D.Cardiovascular Disease Physician1932442779
  15. Abhishek Keraliya, M.D.Diagnostic Radiology Physician1184033649
  16. Liya Kerem, MDPediatric Endocrinology Physician1659893048
  17. Polina KerimbayevaStudent in an Organized Health Care Education/Training Program1083460174
  18. Deanna Kerkhof, PA-C MPHPhysician Assistant1841806213
  19. Robert Kerley, MDClinical Cardiac Electrophysiology Physician1366280950
  20. Hannah KermanHospitalist Physician1265000475
  21. Sophia KermanStudent in an Organized Health Care Education/Training Program1972205458
  22. Anna Kern, FNP-CFamily Nurse Practitioner1033626841
  23. Nathaniel Kern, MD, ATC, CSCSStudent in an Organized Health Care Education/Training Program1841719093
  24. Henrietta Kernan, D.O.Psychiatry Physician1265585202
  25. Christina Kerner, MDInternal Medicine Physician1376235770
  26. Jeffrey Kerner, MDPsychiatry Physician1609162650
  27. Jeremy Kernitsky, DDSPeriodontics1265913867
  28. Amber Kernodle, M.D.Vascular Surgery Physician1417342395
  29. Margaret Kerns, NPAcute Care Nurse Practitioner1710272596
  30. Brian Kerr, RPHPharmacist1750369047
  31. Siobhan KerrClinical Social Worker1013673367
  32. Zachary KerrSocial Worker1154879849
  33. Kasey Kerrigan, MSW, LICSWSocial Worker1861377251
  34. Vanessa Kerry, M.D. M.SCCritical Care Medicine (Internal Medicine) Physician1285839712
  35. Calvin Kersbergen, MDStudent in an Organized Health Care Education/Training Program1275078420
  36. Robert Kershner, M.D.Ophthalmology Physician1922115500
  37. David Kerstein, M.D.Student in an Organized Health Care Education/Training Program1861652802
  38. Jason KersteinPediatric Critical Care Medicine Physician1265963102
  39. Robert Kerstein, DMDGeneral Practice Dentistry1790852689
  40. Jennifer Kertesz, MDDiagnostic Radiology Physician1063688034
  41. Jason Kerzer, DOFamily Medicine Physician1497165880
  42. Leslie Kerzner, MDNeonatal-Perinatal Medicine Physician1932188034
  43. Aboli Kesbhat, MDStudent in an Organized Health Care Education/Training Program1831038439
  44. Yonatan Keschner, MDEmergency Medicine Physician1720437866
  45. Elif KeserOrthodontics and Dentofacial Orthopedics Dentistry1720120132
  46. Aaron Kesselheim, M.D.Internal Medicine Physician1063478626
  47. Jared Kesselheim, MDInternal Medicine Physician1528194990
  48. Jennifer Kesselheim, MDPediatric Hematology & Oncology Physician1851494397
  49. Elana Kesselman, WHNP-BCNurse Practitioner1346840386
  50. Julianna Kessilyas, PA-CPhysician Assistant1891409900

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.