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 196 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 Diiorio, MDRheumatology Physician1598224859
  2. Erin Dijulio, RNRegistered Nurse1568851624
  3. Jeffrey Dileo, D.O.Diagnostic Radiology Physician1831464551
  4. Justin Dilibero, MSN, RN, CNS-BCClinical Nurse Specialist1598215584
  5. Deborah DillWomen's Health Nurse Practitioner1598372427
  6. Lisa Diller, MDPediatric Hematology & Oncology Physician1497773923
  7. Leela Dilley, MD, PHDStudent in an Organized Health Care Education/Training Program1245817436
  8. Robert Dilley, MD, PHDStudent in an Organized Health Care Education/Training Program1609452705
  9. John Dillingham, PT, DPTPhysical Therapist1346706728
  10. Hannah DillisMental Health Counselor1316548548
  11. Shay Dillis, NPNurse Practitioner1548228117
  12. Brooklyn Dillon, EDMMental Health Counselor1073354999
  13. Deborah Dillon, MDAnatomic Pathology Physician1740247063
  14. Emily DillonStudent in an Organized Health Care Education/Training Program1396500708
  15. John Dillon, MDPsychiatry Physician1164985222
  16. Kara Dillon, MDInternal Medicine Physician1760019350
  17. Noreen Dillon, OTROccupational Therapist1558438515
  18. Alexander Dills, DODiagnostic Radiology Physician1215514385
  19. Caroline DiltsClinical Social Worker1174007629
  20. Maria Diluigi, RDHDental Hygienist1356942296
  21. Lauren Dilullo, PSYDPsychologist1063026003
  22. Paige DimambroFamily Nurse Practitioner1467837542
  23. Tsana Dimanin, M.S.W.Clinical Social Worker1912162306
  24. Erin DimarcaBehavior Technician1417693102
  25. Karissa DimarzioPsychologist1851130512
  26. Kyle DimattioBehavior Technician1639743735
  27. Ashley DimauroGerontology Nurse Practitioner1669018370
  28. Audrey Dimauro, M.D.Child & Adolescent Psychiatry Physician1871941039
  29. Kristen Dimauro, NPFamily Nurse Practitioner1902397631
  30. Ryan Dimentberg, MDStudent in an Organized Health Care Education/Training Program1235931437
  31. Amanda Dimeo, PA-CPhysician Assistant1417775248
  32. Carli Dimeo, OTDOccupational Therapist1447915582
  33. Jordan Dimitrakoff, M.D., PH.D.Internal Medicine Physician1225272412
  34. Noelle Dimitri, LICSWClinical Social Worker1386799005
  35. Irene Dimitriadis, M.D.Obstetrics & Gynecology Physician1134482748
  36. Helena Dimitriou, PAMedical Physician Assistant1962466177
  37. Dimo Dimitrov, M.D.Student in an Organized Health Care Education/Training Program1851084990
  38. Teresa Dimodica, MSN, NP-C, RNNurse Practitioner1649845355
  39. Ivan DimovStudent in an Organized Health Care Education/Training Program1396430351
  40. Ryan Din, MDAllergy & Immunology (Internal Medicine) Physician1679139133
  41. Shai DinaBehavior Technician1407545932
  42. Pradeep Dinakar, MD, MS, MBAPain Medicine (Psychiatry & Neurology) Physician1073650057
  43. Gabrielle DinapoliNurse Practitioner1104716513
  44. Lauren Dinapoli, PA-CPhysician Assistant1902514987
  45. James Dinardo, M.D.Anesthesiology Physician1962496281
  46. Lauren DinardoSpeech-Language Pathologist1164678348
  47. Olivia DinardoCertified Registered Nurse Anesthetist1972952810
  48. Rosaria Dinardo, FNPFamily Nurse Practitioner1811323207
  49. Doruk Dinc, LICSWSocial Worker1336845114
  50. Aliya Dincer, MDStudent in an Organized Health Care Education/Training Program1851094890

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.