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 195 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. Alexis Dickinson, NPPsychiatric/Mental Health Nurse Practitioner1164099826
  2. Mark Dickinson, MDPediatrics Physician1154320059
  3. William Dickinson, M.D.Internal Medicine Physician1306341300
  4. Madison DickisonBehavior Technician1245954163
  5. Laura Dickman, LICSWClinical Social Worker1689169625
  6. Monica Dickmann, CRNACertified Registered Nurse Anesthetist1306416722
  7. John Dickson, M.D.,PH.D.Neurology Physician1912388174
  8. Justine Dickson, PHARMDPharmacist1538457247
  9. Aaron Dickstein, M.D.Gastroenterology Physician1003059239
  10. Jacob DicksteinGastroenterology Physician1861756165
  11. Laura Dicola, MDPsychiatry Physician1861841173
  12. Brianna DicristofaroOccupational Therapist1801506068
  13. Ryne Didier, MDPediatric Radiology Physician1104117209
  14. Dorothy Didomenico, FNP-BCFamily Nurse Practitioner1760024053
  15. Brendan Diederichs, MDDiagnostic Radiology Physician1316490410
  16. Stephen DiefenderferPhysician Assistant1497488704
  17. Paul Dieffenbach, M.D.Critical Care Medicine (Internal Medicine) Physician1376717348
  18. Brian Diehl, LICSWClinical Social Worker1245679372
  19. Maribeth Diener, RNRegistered Nurse1568930998
  20. Jules Dienstag, MDInternal Medicine Physician1710959390
  21. Bradford Diephuis, M.D.Internal Medicine Physician1730537424
  22. Gillian Diercks, M.D.Pediatric Otolaryngology Physician1255573515
  23. Kira Dies, SCMGenetic Counselor (M.S.)1710975644
  24. Samantha DietelBehavior Technician1609655125
  25. Laura Dietmann, PSYDClinical Psychologist1972040483
  26. Christopher DietrichStudent in an Organized Health Care Education/Training Program1255191409
  27. Jorg Dietrich, MD PHDNeurology Physician1407977473
  28. Isabelle Dieu, PHARMDPharmacist1528722832
  29. Emily DiezemannFamily Nurse Practitioner1821770165
  30. Liliana Difabio, DMDGeneral Practice Dentistry1790996940
  31. Paul Difanti, LMHCMental Health Counselor1336224294
  32. Rachel Difazio, NPPediatric Nurse Practitioner1609832260
  33. Michelle DifeliceMental Health Counselor1801440805
  34. Alyssa DifilippoNurse Practitioner1386362770
  35. Kathryn Difiore, NPAcute Care Nurse Practitioner1700308848
  36. Matthew Difrancesco, MDInternal Medicine Physician1861805855
  37. Emilia DifrancoStudent in an Organized Health Care Education/Training Program1801630702
  38. Alexandra Difulvio, DNPPsychiatric/Mental Health Nurse Practitioner1780316901
  39. Sarah Digeronimo, NP-CNurse Practitioner1750801460
  40. Christopher Digesu, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1164764338
  41. Stephen DiggsPhysician Assistant1063154128
  42. Anand Dighe, MD PHDAnatomic Pathology & Clinical Pathology Physician1427032341
  43. Erik Digiacomo, MDDiagnostic Radiology Physician1861123374
  44. Beth Digiammarino, NPGerontology Nurse Practitioner1477076461
  45. Donna Digioia, MDPsychiatry Physician1972593119
  46. Catherine Digiorgio, MDProcedural Dermatology Physician1952543506
  47. Christina Digiovanni, PA-CPhysician Assistant1104315993
  48. Madeline Digiovanni, MDStudent in an Organized Health Care Education/Training Program1972353902
  49. Sarah Digregorio, LICSWClinical Social Worker1669135430
  50. Subba Digumarthy, MDDiagnostic Radiology Physician1689623886

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.