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

William Obrien, LCSW

Individual provider Clinical Social Worker · NPI 1851707582

William Obrien, LCSW is a Clinical Social Worker in New York, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2014
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

64 E 111th St Apt 608
New York, NY 10029-0249 Not confirmed with CMS for 12 years — call before visiting
Phone: (917) 587-6711
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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 · Licence 080208 (NY)

Record details

NPI number1851707582
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJuly 2, 2014
Last updated in NPPESJuly 2, 2014

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