Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mrs. Leslie R O'Brien, MSW, LICSW

Individual provider Clinical Social Worker · NPI 1497067631

Mrs. Leslie R O'Brien, MSW, LICSW is a Clinical Social Worker in Lexington, Massachusetts. Practices as a sole proprietor. Registered with an NPI since 2010.

In the registry since
2010
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

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Practice location Address checks out

52 Waltham St
Lexington, MA 02421-5407
Phone: (857) 263-3403
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X

Record details

NPI number1497067631
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSW , LICSW
Sole proprietorYes
NPI enumeratedJuly 3, 2010
Last updated in NPPESMay 6, 2025
Certification dateMay 6, 2025

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