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 17 of 19.
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
- Francheyska Silfa Mazara, M.D.Pediatrics Physician1316137458
- Alexa SilvaSocial Worker1831884360
- Luella Simakauskas, OTR/LOccupational Therapist1124426077
- Andrew Simkin, M.D.Dermatology Physician1730179623
- Cedrick SimonBehavior Technician1700779477
- Patrycja Simoneau, LMHCMental Health Counselor1962157305
- William Sinausky, RPHPharmacotherapy Pharmacist1497924559
- Lakshmi Sivasankar, M.D.Internal Medicine Physician1497799779
- Kayla SmithBehavior Analyst1366087496
- Rebecca Snelgrove, LMHCMental Health Counselor1275516403
- Marlene Snider, PHARMACISTPharmacist1790197895
- Lisa Sobhian, LICSWClinical Social Worker1902495344
- Deborah Solomon, PSY.D.Clinical Psychologist1801993423
- Janarthanan Someswarananthan, MDInternal Medicine Physician1134212830
- Amanda SorensenCounselor1053262394
- Laurie Soroken, NURSE PRACTITIONERRegistered Nurse1750479291
- Kaiya SparksBehavior Technician1184583205
- Jeffrey Speller, M.D.Psychiatry Physician1093808248
- Adina SreyPharmacist1730783424
- Patrick SsekyoleMarriage & Family Therapist1467182220
- Caitlin StairsSchool Social Worker1295274975
- Caroline Stark, DPTPhysical Therapist1568060267
- Eric Stein, MDOtolaryngology Physician1053309328
- Mark Stevens, D.M.D.Dentist1982053203
- Michela Stone, M.S., CCC-SLPSpeech-Language Pathologist1902500564
- Jessica Stott, BCBABehavior Analyst1336568930
- Barbara Stryker, MSPTPhysical Therapist1972951143
- Louis Stylos, D.M.D.General Practice Dentistry1982707253
- Jacques Hagop Sulahian, M.DPediatrics Physician1780849943
- Caitlin SullivanBehavior Analyst1184217903
- Kelsey Sullivan, MSN, FNP-BCFamily Nurse Practitioner1487270385
- Rekha Sundar, M.D.Internal Medicine Physician1356308597
- Rachel SurridgePhysician Assistant1659143840
- Brittany Sutton, BCBABehavior Analyst1952297566
- Sheila Swales, NPPsychiatric/Mental Health Nurse Practitioner1770746836
- Divya Swarup, D.M.D.Dentist1245608041
- Kathleen Sweeney, PTPhysical Therapist1902938608
- Cristen Sweet, LICSW, LADCClinical Social Worker1831294925
- Cameron SwitzerClinical Social Worker1831643303
- Steven Tambascio, D.C.Chiropractor1508273236
- Dickens Tamukedde, LPNLicensed Practical Nurse1659854545
- Weileen TanPharmacist1760658454
- Alison Tassinari, NPFamily Nurse Practitioner1770992174
- Ashley Tavares, FNPInternal Medicine Physician1730546284
- Ashley Taylor, LICSWClinical Social Worker1598058000
- Erica TaylorBehavior Technician1447816335
- Nancy Taylor, BCBABehavior Analyst1770181497
- Jill Tays, D.C.Chiropractor1659414282
- Kedar Thomas, LICSWClinical Social Worker1144747445
- Kathryn ThompsonRegistered Nurse1881089803
The largest Massachusetts cities
- Boston41,865
- Worcester13,166
- Springfield8,553
- Cambridge5,145
- Brockton4,287
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.