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 396 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. Hans-Georg Klingemann, MDInternal Medicine Physician1679677314
  2. Rachel KlingensteinClinical Social Worker1104513373
  3. Amanda Klinger, M.D.Internal Medicine Physician1952781619
  4. Lauren Klingman, LICSWSocial Worker1841916772
  5. Elizabeth Klings, M.D.Pulmonary Disease Physician1982681755
  6. Katlyn KlinskeStudent in an Organized Health Care Education/Training Program1629812714
  7. Lori Kloc, NPAcute Care Nurse Practitioner1922317114
  8. Michael Klompas, MDInfectious Disease Physician1710955414
  9. Malgorzata Klonowska, M.D.Neurology Physician1225147721
  10. Erik KlontzClinical Pathology/Laboratory Medicine Physician1417533977
  11. Colin Kloock, MDStudent in an Organized Health Care Education/Training Program1720665599
  12. Bethany Klos, RD, LDNRegistered Dietitian1831119288
  13. Julia Klosk, RD, LDNRegistered Dietitian1447026901
  14. Lisa Klosterboer, CPNP AC/PCPediatric Nurse Practitioner1235596016
  15. Timothy Klouda, D.O.Pediatric Pulmonology Physician1437508330
  16. Roman Klufas, MDNeuroradiology Physician1598744427
  17. Maximiliano Klug, MDDiagnostic Radiology Physician1841182565
  18. Jacquelin Kluge, ATCAthletic Trainer1992499040
  19. Sonja KlumppStudent in an Organized Health Care Education/Training Program1932047842
  20. Renee Kmetzo, CRNACertified Registered Nurse Anesthetist1578122842
  21. Mary Knab, P.T.Physical Therapist1013328905
  22. Matthew Knabel, DPMFoot & Ankle Surgery Podiatrist1417489667
  23. Marcelo KnapikPhysical Therapist1497221295
  24. Christine Knapp, CNMAdvanced Practice Midwife1851434757
  25. Margo Knapp, MDChild & Adolescent Psychiatry Physician1609092550
  26. Philip Knapp, MDEndocrinology, Diabetes & Metabolism Physician1407819444
  27. Robert Knapp, DOAnesthesiology Physician1932166733
  28. Sarah Knapp, M.D.Endocrinology, Diabetes & Metabolism Physician1902253586
  29. Natalia KnaraPhysical Therapist1205619590
  30. Maryanne Knasas Irwin, DMDEndodontics1538376165
  31. Hanna Knauss, MDInternal Medicine Physician1851973754
  32. Robert Knauz, PHDPsychologist1710968169
  33. Michael Kneeland, MDInternal Medicine Physician1346326352
  34. Jamie KnellSurgery Physician1447645783
  35. Erik Knelson, M.D., PH.D.Internal Medicine Physician1528449717
  36. Andrea Knestel, PH.D.Clinical Psychologist1780161091
  37. Amitha Knight, MDPediatrics Physician1669595187
  38. Dynyella KnightCase Manager/Care Coordinator1669219424
  39. Helen Knight, MDInternal Medicine Physician1932565199
  40. Jeffrey Knight, PH.D.Clinical Neuropsychologist1538266226
  41. Jessica Knight, MS OTR/LOccupational Therapist1306091566
  42. Jessica Knight, FNPFamily Nurse Practitioner1639540610
  43. John Knight, MDPediatrics Physician1104938323
  44. Jordan KnightAthletic Trainer1740724400
  45. Nina KnightBehavior Technician1407623259
  46. Paige KnightCounselor1619643657
  47. Kenia Knights, M.D.Student in an Organized Health Care Education/Training Program1922444678
  48. Rachel Knipe, MDInternal Medicine Physician1093972556
  49. David Knipp, M.D.Diagnostic Radiology Physician1336567098
  50. Ariel KnissDiagnostic Radiology Physician1851910426

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.