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 223 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. Nancy Enos, NPAdult Health Nurse Practitioner1700967882
  2. Cynthia Enright, NP-CNurse Practitioner1437367380
  3. Maeve EnrightStudent in an Organized Health Care Education/Training Program1679327639
  4. Deyanira EnriquezStudent in an Organized Health Care Education/Training Program1376385062
  5. Alejandro Enriquez Marulanda, MDStudent in an Organized Health Care Education/Training Program1588155303
  6. Sarah Enteen, DNP, CNM, MPHAdvanced Practice Midwife1821612623
  7. Samuel EnumahSurgery Physician1912246968
  8. Andrea Enzinger, M.D.Internal Medicine Physician1669639258
  9. Peter Enzinger, DRMedical Oncology Physician1710954391
  10. Elizabeth EomStudent in an Organized Health Care Education/Training Program1275233983
  11. Yan Epelboym, M.D.,M.P.H.Vascular & Interventional Radiology Physician1427314970
  12. Rebka EphremStudent in an Organized Health Care Education/Training Program1093656902
  13. Henry Epino, MDEmergency Medicine Physician1790767911
  14. Gary Epler, MDPulmonary Disease Physician1184680308
  15. Nicole Epolito, NP-CNurse Practitioner1457998072
  16. Kate Eppinger, MSW, LCSWClinical Social Worker1881109171
  17. Cheri Epps, LADCI, MSWAddiction (Substance Use Disorder) Counselor1407390123
  18. Arnold Epstein, MDInternal Medicine Physician1205893518
  19. Heidi Epstein, LICSWClinical Social Worker1639374119
  20. Katherine EpsteinChild & Adolescent Psychiatry Physician1992209969
  21. Laurence Epstein, MDClinical Cardiac Electrophysiology Physician1457318859
  22. Lawrence Epstein, M.D.Sleep Medicine (Internal Medicine) Physician1811978711
  23. Lawrence Epstein, PHDPsychiatry Physician1770891194
  24. Lori Epstein, OPTICIANOptician1134258429
  25. Lynn Epstein, M.D.Psychiatry Physician1073640959
  26. Melvin Epstein, M.D.Neurological Surgery Physician1811018062
  27. Michael Epstein, MDPediatrics Physician1437597085
  28. Nancy Epstein, DMDGeneral Practice Dentistry1821654088
  29. Rachel Epstein, M.D.Internal Medicine Physician1265660351
  30. Rachel EpsteinCertified Registered Nurse Anesthetist1952142010
  31. Eric Erak, MDStudent in an Organized Health Care Education/Training Program1417731878
  32. Vinayak EranezhathStudent in an Organized Health Care Education/Training Program1083416127
  33. Jennifer Erbe Leggett, MSW, LICSWClinical Social Worker1689618134
  34. Susanna Erber, M.D.Obstetrics & Gynecology Physician1174506141
  35. Louis Ercolani, M.D.Nephrology Physician1164407516
  36. Carmina Erdei, MDPediatrics Physician1700049137
  37. Rachel Erdil, MDInfectious Disease Physician1831548957
  38. John Erdman, MDStudent in an Organized Health Care Education/Training Program1952040040
  39. Hannah Erdogan, MDStudent in an Organized Health Care Education/Training Program1306785498
  40. Ozge Erdogan, DDSEndodontics1417504119
  41. Federico Erebia, M.D.Internal Medicine Physician1588639744
  42. Alana EreioAddiction (Substance Use Disorder) Counselor1033819404
  43. Anna Sarah Erem, MDDermatopathology Physician1841878428
  44. Feyza Erenler, M.D.Endocrinology, Diabetes & Metabolism Physician1013395375
  45. Rasa Erfan, DDSDentist1376288829
  46. Parsa Erfani, BAStudent in an Organized Health Care Education/Training Program1194465674
  47. Berrin Ergun-Longmire, MDPediatric Endocrinology Physician1306898812
  48. Gillian Erhabor, PH.D.Psychologist1437460953
  49. Timothy Erickson, M.D.Emergency Medicine Physician1699792135
  50. Dawn Ericson, MDPediatric Pulmonology Physician1578653853

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.