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 19 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. Danielle WattsBehavior Analyst1841783883
  2. Christina Wei, M.D.Internal Medicine Physician1639167257
  3. Krystal WelchBehavior Technician1366944829
  4. Emily Welsh, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1700295672
  5. Gatewood West, LICSWClinical Social Worker1528115979
  6. Nathan Wetzelberg, DPTPhysical Therapist1558069377
  7. Mary-Ellen Wildman, LMHCMental Health Counselor1427092063
  8. Jenna Willard, O.D.Optometrist1558744409
  9. Meghan Williams, AU.D.Audiologist1124469846
  10. Serene Williams-Kasili, FNP-BCFamily Nurse Practitioner1144696675
  11. Ann WilliamsonClinical Social Worker1770886236
  12. Audrey Wilson, CLMT MMPMassage Therapist1346449493
  13. Colleen Wilson, NPNurse Practitioner1730133661
  14. Wendla Windt, LICSW,CADACII,LADCClinical Social Worker1821034802
  15. Jean Winslow, LMHCMental Health Counselor1356445076
  16. Anna Wolen, LMHC, ATRMental Health Counselor1235872326
  17. Maryalice Wolfe, M.D.Obstetrics & Gynecology Physician1437506029
  18. Rebecca WolstencroftCounseling Psychologist1568733707
  19. Jessica WongStudent in an Organized Health Care Education/Training Program1699641951
  20. Tricia Woolard, BCBABehavior Analyst1538477922
  21. Jessica Workman, M.ED, BCBABehavior Analyst1104465350
  22. John Wu, NPAdult Health Nurse Practitioner1447212725
  23. Samuel WuBehavior Analyst1639067333
  24. Jianing Xiao, NPAdult Health Nurse Practitioner1346507092
  25. Elizabeth YakaboskiAllergy & Immunology Physician1134583560
  26. Arthur Yee, DMDGeneral Practice Dentistry1497710453
  27. Serena Yenowskas, DPTPhysical Therapist1215793344
  28. Michell YepesBehavior Technician1437042108
  29. David Yi, MDOphthalmology Physician1003808197
  30. Leslie YnfantePharmacist1578292173
  31. Sopheap You ColonBehavior Technician1477152312
  32. Twinkle YumasiBehavior Technician1295227049
  33. Theodore Yurkosky, MDObstetrics & Gynecology Physician1437208352
  34. Emily Zielinski, FNP-BCFamily Nurse Practitioner1629704598
  35. Courtney Zilka, SLPSpeech-Language Pathologist1730067059
  36. Samuel Zouzas, PHARM.DPharmacist1669813077
  37. Tanya Zouzas, DOInternal Medicine Physician1952310302

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.