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 124 of 838.
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
- John Michael Castillo, DOStudent in an Organized Health Care Education/Training Program1285262360
- Jorge Castillo, MDHematology (Internal Medicine) Physician1689891129
- Reyna CastilloMental Health Counselor1164932950
- Rochelle Castillo, M.D.Dermatology Physician1750776498
- Tiffany Castillo, MDAdult Reconstructive Orthopaedic Surgery Physician1952690455
- Cesar Castillo GarnicaCase Manager/Care Coordinator1437854155
- Marta Castillo-RamosCounselor1255710612
- Allison Castino, MSW, LCSWClinical Social Worker1295396703
- Alison Castle, MDInfectious Disease Physician1154772309
- Ann Castle, R.N.Psychiatric/Mental Health Registered Nurse1083644256
- Caroline Castle, LCSWClinical Social Worker1730040866
- Elizabeth Castle, PNP-ACPediatric Nurse Practitioner1073059135
- Roselene Castor, RNRegistered Nurse1811176274
- Alba CastroStudent in an Organized Health Care Education/Training Program1942096185
- Alexander CastroStudent in an Organized Health Care Education/Training Program1356043590
- Andrea Castro, DNAP, CRNAAnesthesiology Physician1710738448
- Cesar Castro, M.D., M.SC.Medical Oncology Physician1184824112
- Sara Castro, MD, MPHStudent in an Organized Health Care Education/Training Program1629910039
- Bruna Maria Castro De Oliveira, M.D.Anesthesiology Physician1326426099
- Manuel Castro Suarez, BA, M. ED.Behavior Analyst1598652216
- Ilse Castro-Aragon, M.D.Diagnostic Radiology Physician1043244221
- Cristina Castro-Rivera, MDPHDInternal Medicine Physician1336723204
- Elizabeth Castronovo, AGNP-BCAdult Health Nurse Practitioner1184012221
- Ashley Caswell, BEHAVIORAL THERAPISTBehavior Technician1770138349
- Jacob Caswell, MSWSocial Worker1619684495
- Camille CatalanoOther Specialist/Technologist1972943736
- Deven Catalano, PA-CPhysician Assistant1265125694
- Onofrio Catalano, MDDiagnostic Radiology Physician1972770550
- Julie Catalano Bahmiller, DDSPediatric Dentistry1679701353
- Mariel Cataldi, MDPsychiatry Physician1063875482
- Sule Cataltepe, MDNeonatal-Perinatal Medicine Physician1831140375
- Elise CatanSocial Worker1306734462
- Maria Andreea Catana, M.DGastroenterology Physician1215175211
- Justina Catarino, PA-CMedical Physician Assistant1114697430
- Nicole Catatao, NPFamily Nurse Practitioner1588830160
- Christine CateClinical Social Worker1851877708
- Kathryn CaterStudent in an Organized Health Care Education/Training Program1922744598
- Corinne Cather, PHDPsychologist1174513725
- Jaimee Cathers, NPAcute Care Nurse Practitioner1790295244
- Mariedaphnee CatinSocial Worker1306528674
- Jacob CatinellaStudent in an Organized Health Care Education/Training Program1093559197
- Leo CatinellaStudent in an Organized Health Care Education/Training Program1275378853
- Victoria Catizone, PT, DPT, PCSPediatric Physical Therapist1053287896
- Elizabeth Catlin, MDNeonatal-Perinatal Medicine Physician1952391237
- Kristen Catlin, LICSWClinical Social Worker1245673128
- Sarah Catlin, M.D.Obstetrics & Gynecology Physician1851582977
- Fabiola CatulleCase Manager/Care Coordinator1669941530
- Ilaria Caturegli, MDStudent in an Organized Health Care Education/Training Program1235785262
- Bennett Caughey, MDMedical Oncology Physician1427410331
- Adam Caughhorn, MSN, RN, AG-CNSClinical Nurse Specialist1912650409
The largest Massachusetts cities
- Worcester13,166
- Springfield8,553
- Cambridge5,145
- Brockton4,287
- Milford3,459
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.