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 434 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. Cammie Lesser, MD PHDInternal Medicine Physician1639160765
  2. Sarah LessinStudent in an Organized Health Care Education/Training Program1821893777
  3. Ethan Lester, PHDClinical Psychologist1710479316
  4. Susan Lester, MD PHDAnatomic Pathology Physician1780637439
  5. William Lester, MDInternal Medicine Physician1316920184
  6. Maura Lester McSweeney, MSW, LCSWSocial Worker1720718877
  7. Luisa Lestz, FNP-BCNurse Practitioner1790436673
  8. Anthony Letai, MDHematology & Oncology Physician1851368435
  9. Sunjay Letchuman, MDStudent in an Organized Health Care Education/Training Program1063352409
  10. Caroline Letendre, PHARMDAmbulatory Care Pharmacist1114783248
  11. Paul Letendre, LMHCMental Health Counselor1104261460
  12. Alyssa Letourneau, MDInfectious Disease Physician1225164635
  13. Michelle Letourneau, RN-C, ANP-BCAdult Health Nurse Practitioner1205089646
  14. Janelle LettsDoula1831058643
  15. Michael Leukam, M.D.Hematology & Oncology Physician1801209853
  16. Angela Leung, MDObstetrics & Gynecology Physician1346667615
  17. Chiu Shan Leung, R.N.,C.N.M.Midwife1467579466
  18. Derek Leung, D.M.DPediatric Dentistry1306228168
  19. Doug Leung, DMDGeneral Practice Dentistry1326134081
  20. Gerry LeungPharmacist1134974280
  21. Jessica Leung, PHARMDPharmacist1992420269
  22. John Leung, M.D.Gastroenterology Physician1447328711
  23. Lester Leung, M.D.Neurology Physician1396060141
  24. Madelaine Leung, M.D./PH.D.Student in an Organized Health Care Education/Training Program1225829864
  25. Maggie LeungRegistered Nurse1346959335
  26. Nancy LeungClinical Social Worker1598510372
  27. Rachel LeungDoula1053151241
  28. Ruth LeungGastroenterology Registered Nurse1760278139
  29. Shirley LeungPediatric Nurse Practitioner1740003565
  30. Shuk On Leung, MDStudent in an Organized Health Care Education/Training Program1033696828
  31. Sing LeungAcupuncturist1285159194
  32. Michael Leuze, PAPhysician Assistant1588446769
  33. Michael Lev, MDNeuroradiology Physician1962492033
  34. Nina Lev, P.A.Physician Assistant1568421923
  35. Rebecca Leval, MD, MPHPsychiatry Physician1215421607
  36. Rachel Levantovsky, MD, PHDStudent in an Organized Health Care Education/Training Program1548058597
  37. Kathryn Levasseur, AGPCNP-BC, WHNP-BCPrimary Care Nurse Practitioner1811364953
  38. Ryan Levasseur, MDAnesthesiology Physician1881813103
  39. Theresa LevasseurClinical Social Worker1508716762
  40. Marielle LeveillardHome Health Aide1447890090
  41. Nicole LeveilleBehavior Analyst1477037836
  42. Claudia Levenson, P.T.Cardiopulmonary Physical Therapist1457652471
  43. James Levenson, M.D.Internal Medicine Physician1346321916
  44. Nancy Leventhal, MSW, LICSWClinical Social Worker1609906494
  45. Anthony Lever, CPNP-PCPediatric Nurse Practitioner1780245191
  46. Emily Lever, BSN, MSNAdult Health Nurse Practitioner1467013342
  47. Natasha LeverAcute Care Nurse Practitioner1306128863
  48. Elizabeth LeveringArt Therapist1407726490
  49. Erin Levering, CNPAdult Health Nurse Practitioner1023217387
  50. Catherine Leveroni, PHDPsychologist1164498713

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.