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 401 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. Ann Koplow, LICSWClinical Social Worker1508927641
  2. Rhea KoppPhysical Therapy Assistant1275332785
  3. Paul Koppenhaver, PHDSchool Psychologist1346566122
  4. Kristie Koppenheffer, M.D.Pediatrics Physician1316952609
  5. Mary Ann Kopydlowski, RNRegistered Nurse1205978764
  6. Igor Koralnik, M.DNeurology Physician1770525578
  7. Donald Korb, ODOptometrist1851443493
  8. Aiham Korbage, M.D.Diagnostic Radiology Physician1326286097
  9. Akosua Korboe, MDHospitalist Physician1205280815
  10. Kimia Kordestani, PA-CPhysician Assistant1083163901
  11. Elodia Kore, DDSDentist1558032078
  12. Dorit Koren, MDPediatric Endocrinology Physician1477754687
  13. Paula Koren, LICSWClinical Social Worker1548216328
  14. John Koreth, MBBS DPHILHematology (Internal Medicine) Physician1396706503
  15. Ruslan Korets, M.D.Urology Physician1437316502
  16. Joseph KorinStudent in an Organized Health Care Education/Training Program1417702598
  17. Luca Koritsanszky, CNMAdvanced Practice Midwife1417697442
  18. Serge Korjian, M.D.Interventional Cardiology Physician1235586850
  19. Ann Korkidakis, MD MPHObstetrics & Gynecology Physician1043822505
  20. Jessica Korman, PAPhysician Assistant1558661546
  21. Rachel Korman, DMDDentist1912639303
  22. William Kormos, MDInternal Medicine Physician1366403206
  23. Paul Korn, PH.D.Student in an Organized Health Care Education/Training Program1760509343
  24. Joshua Kornbluth, M.D.Neurocritical Care Physician1124219589
  25. Sergio KorndorferPsychiatry Physician1326116195
  26. Patryk Kornecki, PHARM.DPharmacist1417499922
  27. Caleb Korngold, M.D.Psychiatry Physician1477795201
  28. Phyllis Kornguth, MD, PHDDiagnostic Radiology Physician1790741155
  29. Ellen Kornmehl, MDRadiation Oncology Physician1740270487
  30. Robert Korom, MDInternal Medicine Physician1902168347
  31. Alicia KoronaHospitalist Physician1821470386
  32. Walter Koroshetz, MDVascular Neurology Physician1255312211
  33. Susan Korrick, M.D.Internal Medicine Physician1740237916
  34. Mark Korson, MDPediatrics Physician1245347616
  35. Mark KorstStudent in an Organized Health Care Education/Training Program1629879986
  36. Kristina Korte, PHDPsychologist1023469921
  37. Rachel Korus, MDPediatrics Physician1801357280
  38. Joshua Raphael Korzenik, M.D.Gastroenterology Physician1336194752
  39. Pitchaporn KosagoDentist1972336451
  40. Jacob Kosarchuk, MDNeurological Surgery Physician1932729597
  41. Michelle KoshelyukStudent in an Organized Health Care Education/Training Program1700631892
  42. Jacob KoshyHospitalist Physician1013448372
  43. Patricia Kosiorek, M.S.Audiologist1285843995
  44. Viktoria Koskenoja, M.D.Emergency Medicine Physician1205102852
  45. Edward Koski, MD PHDAnesthesiology Physician1306827290
  46. Katherine KosmanPsychiatry Physician1922341726
  47. Hayley Kosmatka, AU.D., CCC-AAudiologist1972872638
  48. Maria Kosovsky, MDInternal Medicine Physician1417319666
  49. Joshua Kosowsky, MDEmergency Medicine Physician1124085444
  50. Tova Kosowsky, MDOphthalmology Physician1649831694

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.