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 424 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. Charles Leahy, O.D.,M.S.Corneal and Contact Management Optometrist1700953783
  2. Kate Leahy, MSW, LCSWSocial Worker1609363464
  3. Kirsten Leahy, MDOrthopaedic Surgery Physician1376248757
  4. Meghan Leahy, PA-CMedical Physician Assistant1881824555
  5. Noreen Leahy, N.P.Nurse Practitioner1285700831
  6. Katelyn Leake, CPNPPediatric Nurse Practitioner1245776228
  7. Annie Leamon, MDStudent in an Organized Health Care Education/Training Program1457110926
  8. Jennifer Leaning, MDEmergency Medicine Physician1851321418
  9. Joseph Leanza, M.DEmergency Medicine Physician1558892356
  10. Christopher Learn, M.D.Adult Congenital Heart Disease Physician1780893685
  11. Brienne Leary, MSN, RN, CPNP-PC/ACPediatric Nurse Practitioner1801399886
  12. Caitlin Leary, FNPFamily Nurse Practitioner1013714633
  13. Ellen Leary, A.N.P.Adult Health Nurse Practitioner1891892568
  14. Jana Leary, M.D.Pediatrics Physician1437202389
  15. Rachel Leary, PSYDClinical Child & Adolescent Psychologist1891197927
  16. Joshua LeastonStudent in an Organized Health Care Education/Training Program1396546487
  17. Rebecca LeatheWomen's Health Nurse Practitioner1467994848
  18. James Leathem, LCSWClinical Social Worker1649387150
  19. Gregory LeatherwoodStudent in an Organized Health Care Education/Training Program1700632809
  20. Alexandra LeavertonPhysician Assistant1841856044
  21. Daniel Leavitt, PHARMACISTPharmacist1780786558
  22. Ellie LeavittClinical Social Worker1093651358
  23. Julianne LeavittPhysician Assistant1164883575
  24. Kenneth Leavitt, DPMPodiatrist1386672343
  25. Rachel Lebarron, MSPASPhysician Assistant1003627951
  26. Khaoula Lebeche, PT,DPTPhysical Therapist1902242555
  27. Christina Lebedis, MDDiagnostic Radiology Physician1073703112
  28. Alyssa Lebel, MDPain Medicine (Psychiatry & Neurology) Physician1235123381
  29. Erin LebelClinical Social Worker1851873137
  30. Kylie Lebel, RDN, LDNRegistered Dietitian1235763103
  31. Abraham Lebenthal, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1053492959
  32. Brooke LeblancStudent in an Organized Health Care Education/Training Program1548054802
  33. Jeffrey Leblanc, DPTOrthopedic Physical Therapist1275081168
  34. Kimberly Leblanc, FNPFamily Nurse Practitioner1740176668
  35. Matthew LeblancCertified Registered Nurse Anesthetist1366934614
  36. Nicole Leblanc, PHDPsychologist1942651856
  37. Yvette Leblanc, M.S., LMHCMental Health Counselor1629681762
  38. Houry Leblebjian, PHARMDOncology Pharmacist1932735818
  39. Samantha LebnerClinical Social Worker1790646941
  40. Meryl Leboff, MDEndocrinology, Diabetes & Metabolism Physician1235106030
  41. Abigail Lebovitz, MDStudent in an Organized Health Care Education/Training Program1578322681
  42. Adriana LebowitzStudent in an Organized Health Care Education/Training Program1790488815
  43. Mollie Lebowitz, MDPediatric Emergency Medicine (Pediatrics) Physician1811157985
  44. Robert Lebowitz, MDPediatric Radiology Physician1326125865
  45. Lunise LebrunBehavior Technician1245025881
  46. Abigail Lecates, MDStudent in an Organized Health Care Education/Training Program1649903147
  47. James Lech, M.D.Psychiatry Physician1245397819
  48. Ronald Lechan, M.D.Endocrinology, Diabetes & Metabolism Physician1700824018
  49. Beatrice Lechner, MDPediatrics Physician1235226879
  50. Aron Lechtig, MDOrthopaedic Surgery Physician1033775002

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.