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 432 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. Erga Lemish, PHDPsychologist1295373496
  2. Kimberly Lemkin, M.D.Psychiatry Physician1316325145
  3. Regan LemleyEpilepsy Physician1114373339
  4. Diana Lemly, MDInternal Medicine Physician1366601726
  5. Alison Lemme, PAPhysician Assistant1528881752
  6. Jordan Lemme, DODiagnostic Radiology Physician1003495128
  7. Emily LemonAcute Care Nurse Practitioner1063842151
  8. Dlorean Lemon-RiggsStudent in an Organized Health Care Education/Training Program1013657451
  9. Galen Lemons, BCBABehavior Analyst1770347163
  10. Carolina Lemos, MDCardiovascular Disease Physician1871288159
  11. Susan Lemus, NPAcute Care Nurse Practitioner1497425938
  12. Evelyn Lemus Silva, MDStudent in an Organized Health Care Education/Training Program1396687307
  13. Giselle Lemus TejadaMedical Physician Assistant1710748967
  14. Karen Lenahan, LMHCMental Health Counselor1689087827
  15. Wayne Lencer, MDPediatric Gastroenterology Physician1073541272
  16. Ariana LencioniBehavior Technician1538924063
  17. Carine Lenders, MDPediatric Gastroenterology Physician1205817079
  18. Patrick LenehanStudent in an Organized Health Care Education/Training Program1205695723
  19. Shirie Leng, M.D.Anesthesiology Physician1841247574
  20. Krisztina Lengyel, M.D.Student in an Organized Health Care Education/Training Program1023685450
  21. Julia LenhartPharmacist1356214852
  22. Mary Lenihan, R.N.Registered Nurse1144347782
  23. Steven Lenio, M.D.Neurology Physician1477084713
  24. Belinda Lennerz, M.D, PHDPediatric Endocrinology Physician1396915054
  25. Molly Lennon, LABABehavior Analyst1174976294
  26. Timothy Lens, PA-CPhysician Assistant1104335413
  27. Rene Lento, PHDPsychologist1487102349
  28. Chloe LentonPediatric Nurse Practitioner1760354690
  29. Lauren Lentz, BCBABehavior Analyst1578935359
  30. Megan Leo, M.D.Emergency Medicine Physician1770757858
  31. Sophie Leon, MDStudent in an Organized Health Care Education/Training Program1417707076
  32. Allison Leonard, DPTPhysical Therapist1497706899
  33. Dana LeonardStudent in an Organized Health Care Education/Training Program1831777861
  34. Daniel Leonard, MD, PHDStudent in an Organized Health Care Education/Training Program1588304596
  35. Erica Leonard, FNP-CFamily Nurse Practitioner1720868623
  36. Heidi Leonard, M.A., CCC-AAudiologist1053478891
  37. Jason LeonardCase Manager/Care Coordinator1548048168
  38. Jessica Leonard, RDRegistered Dietitian1063838555
  39. Kevin Leonard, LICSWClinical Social Worker1376090795
  40. Marrissa LeonardSocial Worker1427799022
  41. Maureen Leonard, M.D.Pediatrics Physician1336374552
  42. Shaun LeonardSocial Worker1538883194
  43. Nicole LeonardoStudent in an Organized Health Care Education/Training Program1629920699
  44. Renee LeondikeAdult Health Nurse Practitioner1720467699
  45. Cataldo Leone, D.M.D.Periodontics1326078262
  46. Jose Leone, M.D.Medical Oncology Physician1659532703
  47. Mark Leone, LICSWClinical Social Worker1164914388
  48. Sarah Leone, PH.D.Clinical Psychologist1831598093
  49. Aaron LeongEndocrinology, Diabetes & Metabolism Physician1770939381
  50. Jee-Yoong Leong, MBBSSurgery Physician1891074613

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.