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 194 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. Michael Diaz, PA-CPhysician Assistant1366175754
  2. Nathan Diaz, MS, RD, LDNRegistered Dietitian1487178851
  3. Rony Diaz, MSStudent in an Organized Health Care Education/Training Program1295420081
  4. Ruben Diaz, M.D.Pediatric Endocrinology Physician1497793780
  5. Samantha Diaz, PSYDClinical Psychologist1073182895
  6. William DiazCounselor1811464266
  7. Xiomara DiazCounselor1134455694
  8. Ylira Diaz, L.I.C.S.W.Clinical Social Worker1023328879
  9. Oswaldo Diaz BenitezStudent in an Organized Health Care Education/Training Program1295580389
  10. Dwight Diaz Chambers, MD, PHDPediatric Endocrinology Physician1942837893
  11. Sara Diaz Saravia, MDStudent in an Organized Health Care Education/Training Program1255064481
  12. Maria Paula Diaz Soto, MDInternal Medicine Physician1659876738
  13. Pablo Diaz-Collado, MDOrthopaedic Surgery of the Spine Physician1043578990
  14. Daniel Diaz-Gil, MDPediatric Cardiology Physician1225787187
  15. Yaminette Diaz-Linhart, LICSWClinical Social Worker1265685184
  16. Rafael Diaz-OrdazBehavior Technician1780394817
  17. Jean DibStudent in an Organized Health Care Education/Training Program1215794227
  18. Joe Dib, MDStudent in an Organized Health Care Education/Training Program1679401293
  19. Martin Dib Marambio, M.D.Transplant Surgery Physician1366670770
  20. Sarah Dibari, NPAcute Care Nurse Practitioner1275379869
  21. Jennie DibartolomeoBehavior Technician1598248114
  22. Allitia Dibernardo, MDNeurology Physician1689658981
  23. Frank Dibert, PSYCHOLOGISTPsychologist1174872170
  24. Ronald Dibiase, LICSWMental Health Counselor1407927775
  25. Sofia Dibich, MDPsychiatry Physician1154171312
  26. Michelle Diblasi, D.O.Psychiatry Physician1376920835
  27. Kevin Dibona, MDInternal Medicine Physician1851094486
  28. Kristina Dicamillo, CRNACertified Registered Nurse Anesthetist1750848586
  29. Christopher Dicarlo, PA-CPhysician Assistant1457177081
  30. Gabriella Dicarlo, MD, PHDStudent in an Organized Health Care Education/Training Program1720664402
  31. James Dicarlo, MD, PHDStudent in an Organized Health Care Education/Training Program1821655341
  32. Peter Dicenso, DPTPediatric Physical Therapist1083470504
  33. Tina Dicenso-FlemingPhysical Therapist1790172658
  34. Laura Dichtel, MDEndocrinology, Diabetes & Metabolism Physician1972731289
  35. Andrea Diciaccio, AU.D.Audiologist1851217822
  36. Victoria DicianniSocial Worker1518650431
  37. Regina Dicicco, ANPAdult Health Nurse Practitioner1538254818
  38. Alison Dick, MDObstetrics & Gynecology Physician1770647323
  39. Katherine DickStudent in an Organized Health Care Education/Training Program1346829397
  40. Rosalind Dick-Godfrey, MDStudent in an Organized Health Care Education/Training Program1770286338
  41. Quinten Dicken, MDStudent in an Organized Health Care Education/Training Program1902547185
  42. Anissa Dickerson, CNMAdvanced Practice Midwife1821351404
  43. Bradford Dickerson, MDNeurology Physician1184615700
  44. Chris Dickerson, SSWClinical Social Worker1669395711
  45. Collin Dickerson, MDStudent in an Organized Health Care Education/Training Program1831834506
  46. Megan DickersonClinical Social Worker1316890296
  47. Savaughn DickersonClinical Social Worker1306439450
  48. Shammika DickersonAddiction (Substance Use Disorder) Counselor1194483719
  49. Chandlee Dickey, MDPsychiatry Physician1235195488
  50. Sandra Dickie, FNP-BCFamily Nurse Practitioner1063793800

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.