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 365 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. Madeline Kaczmarek, PA-CPhysician Assistant1821857327
  2. Alexa Kaczmarski, LCSW, MEDClinical Social Worker1922723063
  3. Michael KaczorStudent in an Organized Health Care Education/Training Program1376348169
  4. Kushal Kadakia, MD (2025)Student in an Organized Health Care Education/Training Program1033910112
  5. Arun Kadamkulam Syriac, M.DHematology & Oncology Physician1700262862
  6. Stephan Kadauke, MD, PHDAnatomic Pathology & Clinical Pathology Physician1205249158
  7. Ahmed KadhimGeneral Practice Dentistry1629831466
  8. Samantha Kadin, NPFamily Nurse Practitioner1366064453
  9. Vinay Kadiyala, MDHospitalist Physician1467984385
  10. Annce KadriGeneral Practice Dentistry1417606823
  11. Sarah Kadzielski, M.D.Pediatrics Physician1558482323
  12. Melissa KaeliPsychiatric/Mental Health Nurse Practitioner1386050458
  13. Sarah Kaelin, MD, SCMStudent in an Organized Health Care Education/Training Program1205530813
  14. William Kaelin, M.D.Internal Medicine Physician1093994493
  15. Rathachai Kaewlai, M.D.Diagnostic Radiology Physician1043346794
  16. Nicolette Kafasis, PA-CPhysician Assistant1548901283
  17. Anne Kaferle, D.P.TPhysical Therapist1619297439
  18. Shayan Kafri, DMDDentist1740533074
  19. Elana Kagan, PHDPsychologist1427615822
  20. Jacob Kagan, M.D.Psychiatry Physician1336282565
  21. Leslee Kagan, N.P.Family Nurse Practitioner1366572638
  22. Yoko Kagemoto, M.D.Anesthesiology Physician1447668421
  23. Rosie KahanDoula1982427126
  24. Tamara Kahan, MDStudent in an Organized Health Care Education/Training Program1871295238
  25. Caroline Kahane, M.D.Pediatrics Physician1710428073
  26. Kelila Kahane, MDStudent in an Organized Health Care Education/Training Program1548902570
  27. Jordan KahleStudent in an Organized Health Care Education/Training Program1972122752
  28. Navkirat Kahlon, M.D.Hematology & Oncology Physician1467803056
  29. Amy Kahn, M.D.Neurology Physician1710172903
  30. Barbara Kahn, MDEndocrinology, Diabetes & Metabolism Physician1558300970
  31. C Kahn, M.D.Endocrinology, Diabetes & Metabolism Physician1891845830
  32. Daniel KahnPrimary Care Nurse Practitioner1972957637
  33. Dmitry Kahn, MDInternal Medicine Physician1063062180
  34. Joseph Kahn, M.D.Emergency Medicine Physician1144293572
  35. Josephine Kahn, MD, PHDStudent in an Organized Health Care Education/Training Program1790306777
  36. Judith Kahn, MSW, LICSWClinical Social Worker1477583938
  37. Michael Kahn, M.D.Psychiatry Physician1578515938
  38. Rachel Kahn, LMHCMental Health Counselor1497012405
  39. Sara KahnCommunity Health Worker1063244226
  40. Stacy Kahn, MDPediatric Gastroenterology Physician1912123340
  41. Olivia Kahn-Boesel, MDInternal Medicine Physician1669231320
  42. Mehmet Kahveci, DMDGeneral Practice Dentistry1417975202
  43. Barbara KahwatySurgical Physician Assistant1457416919
  44. Alexis Kaihlanen, DMDDentist1194417758
  45. Kathryn Kail, MSW, MASTERS OF ARTSMental Health Counselor1023267648
  46. Michael Kain, M.D.Orthopaedic Surgery Physician1104092055
  47. Cassandra Kaiser, D.O.Physical Medicine & Rehabilitation Physician1255719324
  48. Courtney Kaiser, MDPsychiatry Physician1396372249
  49. Sarah Kaiser, MS, BCBA, LBABehavior Analyst1609311778
  50. Ursula Kaiser, MDEndocrinology, Diabetes & Metabolism Physician1053377374

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.