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 373 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. Ryan Katides, RN, CNPNurse Practitioner1093315863
  2. Faris Katkhuda, MDPsychiatry Physician1790434876
  3. Daniel Kats, MDHospitalist Physician1114554375
  4. Amalia KatsampoulaGeneral Practice Dentistry1023875267
  5. Kristy Katsetos, LICSWClinical Social Worker1316434418
  6. Anastasia Katsiampoura, MDAnesthesiology Physician1457733370
  7. Joanna Katsos, LICSWClinical Social Worker1255705661
  8. Igor KatsyvDermatopathology (Pathology) Physician1629574165
  9. Mengna KattPharmacist1366118002
  10. Anilkumar Katta, M.D.Internal Medicine Physician1740444991
  11. Susan Kattapuram, MDDiagnostic Radiology Physician1013907294
  12. Gaurav Kattel, MBBS, MDAnatomic Pathology & Clinical Pathology Physician1326691643
  13. Nishanth Katukuri, MDStudent in an Organized Health Care Education/Training Program1568258903
  14. Umakanth Katwa, M.D.Pediatric Sleep Medicine Physician1992737423
  15. Shailendra Katwal, M.D.Diagnostic Radiology Physician1144027335
  16. Alison KatzPhysical Therapist1043511397
  17. Amanda Katz, LICSWClinical Social Worker1700086832
  18. Aviva Katz, PHDPsychologist1912443763
  19. Daniel Katz, M.D.Obstetrics & Gynecology Physician1043439367
  20. Douglas Katz, M.D.Neurology Physician1205899846
  21. Emma KatzPsychologist1134805484
  22. Guy Katz, M.D.Rheumatology Physician1285168187
  23. Harvey Katz, M.D.Pediatrics Physician1487845186
  24. Ian KatzSocial Worker1346120813
  25. Ingrid Katz, M.D.Internal Medicine Physician1043235740
  26. James Katz, M.D.Occupational Medicine Physician1164540662
  27. Jeanne Katz, RNRegistered Nurse1841789633
  28. Jeffrey Katz, MDRheumatology Physician1275582769
  29. Jenna Katz, MDNeonatal-Perinatal Medicine Physician1659802171
  30. Jessica Katz, PTPhysical Therapist1306985361
  31. Joan Katz, M.D.Public Health & General Preventive Medicine Physician1154341576
  32. Joel Katz, MDInfectious Disease Physician1760448005
  33. Joshua Katz, MDStudent in an Organized Health Care Education/Training Program1801546478
  34. Judith Katz, MDNuclear Radiology Physician1063529089
  35. Julia KatzStudent in an Organized Health Care Education/Training Program1982305736
  36. Juliana KatzStudent in an Organized Health Care Education/Training Program1134068075
  37. Leanna Katz, MS, OTD, OTR/LOccupational Therapist1124599808
  38. Liza KatzClinical Social Worker1962984146
  39. Luca KatzStudent in an Organized Health Care Education/Training Program1164360376
  40. Mark Katz, MDUrology Physician1437390507
  41. Marshall Katz, M.D.Cardiovascular Disease Physician1124024013
  42. Michelle Katz, MDPediatric Endocrinology Physician1255514113
  43. Nathan Katz, MDStudent in an Organized Health Care Education/Training Program1841940327
  44. Nicole KatzPhysical Medicine & Rehabilitation Physician1194303529
  45. Samuel Katz, M.D., PH.D.Hematology (Pathology) Physician1942372875
  46. Simonne Katz, LICSWClinical Social Worker1689299521
  47. Tamar Katz, MD, PHDPsychiatry Physician1235577230
  48. Trisha KatzBehavior Technician1992293674
  49. Orna Katz Kadosh, MDOtolaryngology Physician1275117483
  50. Tai Katzenstein, MA, PHDStudent in an Organized Health Care Education/Training Program1124221064

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.