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 433 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. Jonathan Leong, MDStudent in an Organized Health Care Education/Training Program1205412962
  2. Kui Toh Leong, M.D.Cardiovascular Disease Physician1003007121
  3. Alexandra Leong MatternClinical Psychologist1306529276
  4. Jane Leopold, MDInterventional Cardiology Physician1851358162
  5. Natalie Leow, BDS, MDSC, FRACDSPeriodontics1437348554
  6. Tanja LepirPharmacotherapy Pharmacist1598868648
  7. Madeleine Lepore, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1881416386
  8. Anya Lepp, MDInternal Medicine Physician1770742116
  9. Michelle Leppert, M.DNeurology Physician1184914277
  10. Joshua LepsonStudent in an Organized Health Care Education/Training Program1891633707
  11. Elizabeth Leritz, PH.D.Clinical Psychologist1346573292
  12. Sergio Lerma Narvaez, MDPediatric Infectious Diseases Physician1174030456
  13. Mark Lerman, DMDOral and Maxillofacial Pathology Dentistry1295819217
  14. Adam Lerner, M.D.Medical Oncology Physician1063460087
  15. Adam Lerner, M.D.Anesthesiology Physician1588779540
  16. Andrew LernerDentist1821734203
  17. Daniele Lerner, MDPediatrics Physician1407346752
  18. Hilary Lerner, MSN, APRN, FNP-CFamily Nurse Practitioner1811427578
  19. Jason LernerDentist1356038491
  20. Jonathan Lerner, PH.D.Clinical Psychologist1780875732
  21. Rachel Lerner, LICSWClinical Social Worker1497069181
  22. River Lerner, MDStudent in an Organized Health Care Education/Training Program1386494326
  23. Paul Lerou, MDNeonatal-Perinatal Medicine Physician1194780536
  24. Meredith Leroux, CRNACertified Registered Nurse Anesthetist1194957225
  25. Abigail Leroy, LCSWSocial Worker1356087324
  26. Taryn Leroy, MDOrthopaedic Surgery of the Spine Physician1538690375
  27. Nutthaporn LerttanpanStudent in an Organized Health Care Education/Training Program1396665121
  28. Melinda Lerwill, MDAnatomic Pathology Physician1831180389
  29. Nicole Lesanto, PNPPediatric Nurse Practitioner1306185046
  30. Rachel Leschernier, RNAddiction (Substance Use Disorder) Counselor1003620543
  31. Alison Leschinski, CCC-AAudiologist1225001902
  32. Erica Lescinskas, MDInternal Medicine Physician1184878225
  33. Tyler Lescure, MDInternal Medicine Physician1518594928
  34. Eran Leshem, M.DStudent in an Organized Health Care Education/Training Program1114464666
  35. Agnieszka Lesicka, M.D.Anesthesiology Physician1790005262
  36. Mallory Lesieur, M.D.Pulmonary Disease Physician1154784510
  37. Leah LeskePharmacist1558974089
  38. Eric Leskowitz, MDPsychiatry Physician1740271873
  39. Casandra Leslie, MSW, LICSWClinical Social Worker1396091641
  40. David Leslie, M.D.Pediatrics Physician1114966645
  41. Laurel Leslie, M.D., M.P.H.Developmental - Behavioral Pediatrics Physician1417996273
  42. Lisa Leslie, MDEmergency Medicine Physician1417417247
  43. Rebecca LeslieNurse Practitioner1760096887
  44. Jamie LesmeisterStudent in an Organized Health Care Education/Training Program1134078801
  45. Michelle Lespasio, NPAdult Health Nurse Practitioner1932247020
  46. Amberlee Lessard, APRNFamily Nurse Practitioner1588968127
  47. Cynthia Lessard, R.N.Registered Nurse1598986325
  48. Peyton Lessard, RDN, LDNRegistered Dietitian1861373193
  49. Sharon Lessard, N.P.Acute Care Nurse Practitioner1548310675
  50. Elisabeth Lessenich, M.D.Student in an Organized Health Care Education/Training Program1205135829

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.