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 394 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. Mary Kirya, PA-CPhysician Assistant1144950593
  2. Sarah Kiser, CPNP-PCPediatric Nurse Practitioner1376819516
  3. Stephanie Kiser, M.D., MPHHospice and Palliative Medicine (Internal Medicine) Physician1861889800
  4. Thomas Kishkovich, MDStudent in an Organized Health Care Education/Training Program1669009403
  5. Shukuru Kisirani, PA STUDENTStudent in an Organized Health Care Education/Training Program1851172936
  6. Robert Kiskaddon, MDOtolaryngology Physician1548249014
  7. Olya KislovskiyStudent in an Organized Health Care Education/Training Program1548118706
  8. Brittany Kiss, RDRegistered Dietitian1316684020
  9. Doris Kissi, NURSE PRACTITIONERPsychiatric/Mental Health Nurse Practitioner1144940230
  10. Eugene Kissin, M.D.Rheumatology Physician1295770386
  11. Alicia Kissinger-Knox, PSYDPsychologist1396312211
  12. Emmett Kistler, MDPulmonary Disease Physician1457700742
  13. J Kistler, MDInternal Medicine Physician1386626026
  14. John KitStudent in an Organized Health Care Education/Training Program1598568099
  15. Timothy Kita, MDPediatric Emergency Medicine (Pediatrics) Physician1942724851
  16. Barrett Kitch, MDPulmonary Disease Physician1114964392
  17. Debora KitchenAddiction (Substance Use Disorder) Counselor1750033064
  18. Aaron Kithcart, M.D., PH.D.Student in an Organized Health Care Education/Training Program1912206608
  19. Cherisse Kitner, NPFamily Nurse Practitioner1538591466
  20. Anna Kitsos, DMDGeneral Practice Dentistry1215131214
  21. Erin Kittell, N.P.Nurse Practitioner1215156484
  22. Robert Kitts, M.D.Child & Adolescent Psychiatry Physician1568516557
  23. Sean Kivlehan, MDEmergency Medicine Physician1639478092
  24. Harriet Kiwanuka, MDStudent in an Organized Health Care Education/Training Program1831777077
  25. Kathryn KixmoellerStudent in an Organized Health Care Education/Training Program1336087352
  26. Alexander Kiy, M.ED.Professional Counselor1972721389
  27. Yuka Kiyota, M.D.Anesthesiology Physician1821194465
  28. Aneesh Kizhakkedath, NPAdult Health Nurse Practitioner1578146791
  29. Hannah Kiziltug, MDAnesthesiology Physician1386384782
  30. Jennifer Kizza-Brown, MD, MSCStudent in an Organized Health Care Education/Training Program1316649114
  31. Amy Klagges, P.A.Physician Assistant1609888395
  32. Suzanne Klainer, M.D.Anesthesiology Physician1972656916
  33. Eyal KlangDiagnostic Radiology Physician1679443261
  34. Alexandra Klann, MS, MPH, RDRegistered Dietitian1598373599
  35. Steven Klann, LICSWMental Health Counselor1124107727
  36. Seth Klapman, MDAnesthesiology Physician1851928907
  37. Diana Klar, DPTPhysical Therapist1932382876
  38. Steven KlarerAddiction (Substance Use Disorder) Counselor1366519092
  39. Sheila Klassen, MDCardiovascular Disease Physician1013375336
  40. George Klauber, MDUrology Physician1942216163
  41. Ryan KlauckStudent in an Organized Health Care Education/Training Program1306648522
  42. Jack Klausner, DDSDentist1952331639
  43. Shira Klausner, CRNPNurse Practitioner1982312120
  44. Eric Klawiter, MDNeurology Physician1982874046
  45. Christina Klecker, MDSurgery Physician1972008449
  46. John Klecker, DMDStudent in an Organized Health Care Education/Training Program1992299697
  47. Jonathan Klee, PA-CPhysician Assistant1730069501
  48. Jonathan Kleefield, MDNeuroradiology Physician1740366046
  49. Stuart Kleeman, M.D.Pediatrics Physician1841324191
  50. Stephanie Klees, MDPediatrics Physician1912942988

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.