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

William Sinclair, LMSW

Individual provider Clinical Social Worker · NPI 1629213343

William Sinclair, LMSW is a Clinical Social Worker in New York, New York. Licensed in New York. Registered with an NPI since 2008.

Licensed in
NY
In the registry since
2008
What do these letters mean?
LMSW — Licensed Master Social Worker
A master's-level social worker, usually practising under supervision.

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Practice location Address checks out

19 Union Sq W 7th Fl
New York, NY 10003-3304 Not confirmed with CMS for 17 years — call before visiting
Phone: (212) 627-9600
Fax: (212) 627-4040
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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 00077872 (NY)

Record details

NPI number1629213343
Entity typeIndividual (Type 1)
GenderMale
Credentials LMSW
Sole proprietorNo
NPI enumeratedDecember 9, 2008
Last updated in NPPESDecember 9, 2008

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