NPPES file of Aug 9, 2026

Doctors and health care providers in Chelmsford, MA

937 individual NPPES records list a practice address in Chelmsford, 56th of 406 Massachusetts cities. The largest group is behavior technician: 80, 9% of the city's records, against 5% across Massachusetts. Page 18 of 19.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

The 8 largest groups in Chelmsford

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Chelmsford in Massachusetts

  • Rank in Massachusetts56th of 406 cities by records
  • Share of the state0.4% of Massachusetts's records
  • Specialties present25 or more taxonomy codes
  • Top three groups23.2% of all records

Compared with Massachusetts as a whole, Chelmsford has 3.7× the state's share of behavior analyst records and 0.21× its share of student in an organized health care education/training program records.

Providers in Chelmsford, alphabetically

  1. Marlena ThompsonSocial Worker1235719014
  2. Sallay Thulla, MAMental Health Counselor1962237545
  3. Gail Thursby, CCC-SLPSpeech-Language Pathologist1154684900
  4. Kristine Thurston, M.S., BCBABehavior Analyst1174986111
  5. Tara Thurston, D.O.Pediatrics Physician1790830495
  6. Padraig TittemoreCounselor1841118767
  7. Alison Towns, DMDDentist1104494228
  8. David Tracy, MDOphthalmology Physician1225020316
  9. Donna TranBehavior Technician1497313076
  10. Quynh Tran, PSY.D.Clinical Psychologist1841983723
  11. Win Travassos, MDGastroenterology Physician1861480220
  12. Julie TraversSpeech-Language Pathologist1205641917
  13. Kim Travis, OTR/LOccupational Therapist1578351474
  14. Phinehas TreptowBehavior Technician1780140327
  15. Amanda Tresback, MSWMental Health Counselor1306232897
  16. Kimberly Tresch, M.D.Pediatrics Physician1992785125
  17. Michelle Troyer, MSW, LICSWSocial Worker1285203240
  18. Ani-I Tsai, DMDPeriodontics1699830596
  19. Sarah TsakalakosBehavior Analyst1043017080
  20. Lisa Tylus, AGNP-CNurse Practitioner1316323751
  21. Katherine Tyros, DMDDentist1457557399
  22. Patricia UrenaBehavior Technician1508352345
  23. Sandra Usher, CNPNurse Practitioner1487833745
  24. Grace Valaparla, N.P.Family Nurse Practitioner1285068197
  25. Janaki Varadhan, MDSurgery Physician1619957628
  26. Tori VargasSocial Worker1639095003
  27. Sherly Varghese, PT, MSPTPhysical Therapist1831322296
  28. Ani Varzhapetyan, PTPhysical Therapist1386890465
  29. Suzanne Vazquez, FNP-BCFamily Nurse Practitioner1134854524
  30. Maite Vejar MezaBehavior Technician1205317708
  31. Krystal Velazquez-Bergeron, C.A.G.S., ED.M.Counselor1437414265
  32. Lenny VertierBehavior Analyst1255142543
  33. Donna Vezina, COTA/LOccupational Therapy Assistant1891076188
  34. Nicolle VieiraBehavior Technician1194410837
  35. Sherrie Vlahakis, LSCMental Health Counselor1063978815
  36. Andrea Vosbikian, O.D.Optometrist1144453903
  37. Bethany Vrouhas, NPNurse Practitioner1417403650
  38. Alanna WagmanBehavior Analyst1417419805
  39. Carey Wagner, LICSWClinical Social Worker1720668197
  40. Zipporah Waithaka, FNP-BCFamily Nurse Practitioner1508549320
  41. Kenneth WalkerMassage Therapist1194232009
  42. Constance Wall-Haas, DNPPediatric Nurse Practitioner1629046644
  43. Marcia Walsh, N.P.Acute Care Nurse Practitioner1225068299
  44. Sarah Walsh, M.A.,Mental Health Counselor1770992349
  45. Clifford Walters, DMDGeneral Practice Dentistry1578532784
  46. Molly WanekSpeech-Language Pathologist1013496876
  47. Xueling WangCounselor1861310781
  48. Ying WangBehavior Analyst1487212023
  49. Paul WasswaPharmacist1760328736
  50. Nora Watson, PA-CPhysician Assistant1538507793

The largest Massachusetts cities

  1. Boston41,865
  2. Worcester13,166
  3. Springfield8,553
  4. Cambridge5,145
  5. Brockton4,287

All of Massachusetts →

How to read this directory

Chelmsford, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 937 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 Chelmsford - 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 Chelmsford 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 Chelmsford is weighted toward Behavior Technician (80 clinicians, followed by Behavior Analyst with 74 and Mental Health Counselor with 63). 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, Chelmsford reports roughly 13.4 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, Developmental Therapist is the most prominent one with no provider currently listing a Chelmsford practice address, a coverage gap Chelmsford patients typically fill by traveling to a larger nearby hub.

For Chelmsford 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 Chelmsford, MA?

There are 937 registered healthcare providers in Chelmsford, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Chelmsford?

The most common specialties in Chelmsford are Behavior Technician, Behavior Analyst, Mental Health Counselor, Clinical Social Worker, Physical Therapist. Behavior Technician has the most providers with 80.

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.