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 112 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. Eric CalderonRegistered Dietitian1093687824
  2. Richard Calderon, O.D.Optometrist1962435826
  3. Stephen Calderwood, MDInternal Medicine Physician1134119746
  4. Brandon CaldwellVascular & Interventional Radiology Physician1154804326
  5. Jalen CaldwellBehavior Technician1255016168
  6. Meghan Caldwell, LICSWClinical Social Worker1437527488
  7. Nicholas Caldwell, MDAnatomic Pathology & Clinical Pathology Physician1558011320
  8. Hila Calev, M.D.Internal Medicine Physician1871942052
  9. Nicolina CalfaHealth Psychologist1073947453
  10. Cheryl Calheiros, CNMObstetrics & Gynecology Physician1265418610
  11. Katherine Calia, LICSWClinical Social Worker1730886607
  12. Alyssa CalicchiaClinical Social Worker1912872680
  13. Jessica Calihan, M.D.Pediatrics Physician1215468111
  14. Ezgi Caliskan Guzelce, MDEndocrinology, Diabetes & Metabolism Physician1932796828
  15. Sabrina Calixto, RDOOptician1255762571
  16. Danna CalizSocial Worker1245758275
  17. Nicole Calkins, PHARMDPharmacist1316801798
  18. Nicole Callagy, NURSE PRACTITIONERFamily Nurse Practitioner1891123220
  19. Alison Callahan, MDOphthalmology Physician1992016059
  20. Brenna CallahanNurse Practitioner1235977430
  21. Carinne CallahanPhysical Therapist1194907287
  22. Caroline CallahanNurse Practitioner1962913525
  23. Dana CallahanInternal Medicine Physician1417416231
  24. Grace Callahan, MDStudent in an Organized Health Care Education/Training Program1528760592
  25. Janet Callahan, PTPhysical Therapist1699894915
  26. Michael Callahan, MDPediatric Radiology Physician1285662668
  27. Molly Callahan, RNPediatric Nurse Practitioner1659089068
  28. Ryan Callahan, DPMPodiatrist1265010284
  29. Nancy Callan, M.D.Obstetrics & Gynecology Physician1407839830
  30. Tricia Callaway, LICSWClinical Social Worker1336329168
  31. Nelson Calle, CRNACertified Registered Nurse Anesthetist1134217581
  32. Mark Callery, M.D.Surgery Physician1437189495
  33. William Callison, MD, PHDSurgery Physician1174469811
  34. Marcus Callister, MDNeurology Physician1619472305
  35. Wynne Callon, MDPediatrics Physician1235528274
  36. Amanda Callum, PAPhysician Assistant1306699269
  37. Sade Callwood, PSYDPsychologist1841897345
  38. Elizabeth Calmar, M.D.Pediatric Emergency Medicine (Pediatrics) Physician1417913658
  39. Wilder Calmet Rocca, MDStudent in an Organized Health Care Education/Training Program1174466692
  40. Julia Calnan, LICSWClinical Social Worker1649418898
  41. Keara Calnan, CNPFamily Nurse Practitioner1487331575
  42. Paul Calner, M.D.Emergency Medicine Physician1073774915
  43. Michelande Calvaire, LPNLicensed Practical Nurse1881004646
  44. Katherina Calvillo, M.D.Surgical Oncology Physician1619947793
  45. Maria Calvo Garcia, MDPediatric Radiology Physician1356436109
  46. Diana CamStudent in an Organized Health Care Education/Training Program1679260350
  47. Kaitlyn Cama, NPFamily Nurse Practitioner1801623335
  48. Joyce Camac-Weiser, M.D.Internal Medicine Physician1942271416
  49. Justin Camacho, MDPsychiatry Physician1760273528
  50. Leticia CamachoBehavior Technician1083240717

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.