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 419 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. Julian Larosiliere, DMDStudent in an Organized Health Care Education/Training Program1902652092
  2. Roxane Larouche, NPAmbulatory Care Registered Nurse1114277159
  3. Kerri Larovere, M.D.Neurology with Special Qualifications in Child Neurology Physician1336357615
  4. Mackenzie Larovere, PTPhysical Therapist1225783541
  5. Lisa Larowe, PHDClinical Psychologist1083341077
  6. Heather LarrabeeDoula1386414779
  7. Joan Larrabee, M.D.Internal Medicine Physician1679620538
  8. Jocelyn LarrabeeBehavior Technician1467174144
  9. Morgan Larrabee, FNP-BCFamily Nurse Practitioner1366117244
  10. Susan Larrabee, LICSWSocial Worker1437371259
  11. J. Larrieux, MDUrogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician1144203472
  12. Danielle Larrow, MDOtolaryngology Physician1427678903
  13. Alyson Larsen, PA-CPhysician Assistant1417516162
  14. Karen Larsen, LICSWClinical Social Worker1871000620
  15. P Larsen, MDEndocrinology, Diabetes & Metabolism Physician1700842952
  16. Sarah Larsen, MDFamily Medicine Physician1134756505
  17. Andrew LarsonOtolaryngology Physician1144615253
  18. Anna Larson, MDPediatrics Physician1588078612
  19. Calisandra Larson, ODStudent in an Organized Health Care Education/Training Program1164113262
  20. David Larson, MSPTPhysical Therapist1740288927
  21. Grant Larson, MDStudent in an Organized Health Care Education/Training Program1013719558
  22. Janet Larson, M.D.Internal Medicine Physician1831159326
  23. Joyce Larson, NPAdult Health Nurse Practitioner1437310018
  24. Kara Larson, MS, CCC-SLPSpeech-Language Pathologist1164496048
  25. Megan Larson, BACounselor1891442687
  26. Mykol Larvie, MDDiagnostic Radiology Physician1215907639
  27. Elizabeth Lasalvia, M.D.Psychiatry Physician1174725782
  28. Mary Lasalvia, M.D.Infectious Disease Physician1679730543
  29. Aliese Lash, MSWSocial Worker1295255768
  30. Barbara Lash, R.N.Registered Nurse1043339658
  31. Jonathan Lash, MDOrthopaedic Surgery Physician1073191276
  32. Timothy Lash, MSMental Health Counselor1083454813
  33. Anna LashevskayaClinical Social Worker1639652860
  34. Salena Lashley, DPTPhysical Therapist1477923779
  35. Mariana Lashta, DMDGeneral Practice Dentistry1215782313
  36. Aleksandra Lasica, MBBS, MSCIStudent in an Organized Health Care Education/Training Program1609724939
  37. Elizabeth Laska, MD, MPHStudent in an Organized Health Care Education/Training Program1225788169
  38. Constantinos Laskarides, DMD, DDS, PHARMDOral and Maxillofacial Surgery (Dentist)1215138672
  39. Jeffrey Lasker, MDPediatrics Physician1851375596
  40. Aubrey Lasko, PHARMDPharmacist1669026647
  41. Meletia Laskou, DMDPediatric Dentistry1760646483
  42. Jackie LaskowskiBehavior Technician1801581236
  43. Michael Lasky, MDAnesthesiology Physician1124604194
  44. Jacqueline Lasley, PA-CPhysician Assistant1477010536
  45. Mark Lasorsa, PHARMDPharmacist1861020067
  46. Antonio Lassaletta, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1225284441
  47. Karen Lasser, M.D.Internal Medicine Physician1932235520
  48. Sarah Lassey, M.D.Maternal & Fetal Medicine Physician1265878623
  49. Amanda Lassiter, LCSWClinical Social Worker1033588694
  50. Clinton LassiterExercise & Sports Psychologist1508752130

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.