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 423 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. Alexander LaytonOrthodontics and Dentofacial Orthopedics Dentistry1477123289
  2. Raluca Laza, PHARMDOncology Pharmacist1053241778
  3. Cristina LazarPharmacist1588268213
  4. Harold Lazar, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1205876372
  5. Joseph LazarPediatrics Physician1972845808
  6. Kalyn Lazar, PHARMDPharmacist1013671239
  7. Kathryn LazarMental Health Counselor1013407667
  8. Ricardo Lazaro Pascual, DDSPeriodontics1043863533
  9. Jacob Lazarus, MD, PHDInfectious Disease Physician1457764433
  10. Xavier LazcanoRegistered Nurse1053015909
  11. Rossana Lazcano Segura, MDStudent in an Organized Health Care Education/Training Program1790544856
  12. Christina Lazdowsky, NPPediatric Nurse Practitioner1710324090
  13. Daniela Lazea, MDCritical Care Medicine (Anesthesiology) Physician1417194382
  14. Donald Lazure, PAPhysician Assistant1659450021
  15. Antonio Lazzari, MDInternal Medicine Physician1295784098
  16. Alexander Lazzaro, M.DInternal Medicine Physician1467101923
  17. Alicia Lazzaro, MS RD LDNRegistered Dietitian1144695057
  18. Amanda LeStudent in an Organized Health Care Education/Training Program1609723857
  19. Anh LeBehavior Technician1467145979
  20. Anh LePharmacist1629897848
  21. Cindy LeGeneral Practice Dentistry1538086632
  22. Daniel Le, M.D.Orthopaedic Surgery Physician1518295682
  23. Dao LeStudent in an Organized Health Care Education/Training Program1609622794
  24. Helen Le, P.A.-C.Physician Assistant1922245646
  25. Hien Le, MDInternal Medicine Physician1043668627
  26. Kevin Le, PHARMD, BCACPAmbulatory Care Pharmacist1760348676
  27. Kevin LeInternal Medicine Physician1043159965
  28. Kim Lien Le, PA-CPhysician Assistant1730664020
  29. Long Le, MD, PHDAnatomic Pathology & Clinical Pathology Physician1609997048
  30. Minh-Phuong LeInternal Medicine Physician1902224280
  31. Mylinh LeInternal Medicine Physician1568256253
  32. Nina Le, MDStudent in an Organized Health Care Education/Training Program1932776317
  33. Phison Le, O.D.Optometrist1194074385
  34. Phuoc Le, MDInternal Medicine Physician1811018245
  35. Phuong Le, PHARMDPharmacist1164394532
  36. Tammy Le, RPHPharmacist1518677863
  37. Thao Le, DDSDentist1114169240
  38. Thao Le, MD, PHDPsychiatry Physician1144073446
  39. Thi Som Mai Le, M.D.Student in an Organized Health Care Education/Training Program1053668145
  40. Thuan LeStudent in an Organized Health Care Education/Training Program1043655624
  41. Xiuning Le, M.D.Specialist1720399074
  42. Stephen Le BretonStudent in an Organized Health Care Education/Training Program1588365522
  43. Andrew LeaInternal Medicine Physician1386281830
  44. Cheri Leach, LICSWSocial Worker1528165834
  45. Emily Leach, ODOptometrist1942933247
  46. Julie Leach, BSAddiction (Substance Use Disorder) Counselor1508099581
  47. Michael Leach, MSWSocial Worker1295187268
  48. Andrew LeaderStudent in an Organized Health Care Education/Training Program1134878309
  49. David Leaf, M.D., M.M.S.C.Nephrology Physician1669635124
  50. Michele Leaf, NPNurse Practitioner1295707206

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.