Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Eliza Lynn O'Brien, LICSW

Individual provider Clinical Social Worker · NPI 1669807459

Eliza Lynn O'Brien, LICSW is a Clinical Social Worker in Chelmsford, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2013
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

See every abbreviation used in this directory →

Practice location Address checks out

139 Billerica Rd Unit A-1
Chelmsford, MA 01824-3633
Phone: (617) 780-9510
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 120761 (MA)

Record details

NPI number1669807459
Entity typeIndividual (Type 1)
GenderFemale
Credentials LICSW
Sole proprietorYes
NPI enumeratedSeptember 11, 2013
Last updated in NPPESMay 24, 2023
Certification dateMay 24, 2023

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