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

William L Sullivan, LICSW

Individual provider Clinical Social Worker · NPI 1174572853

William L Sullivan, LICSW is a Clinical Social Worker in Yarmouth Port, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
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

923 Route 6A Unit T
Yarmouth Port, MA 02675-2159
Phone: (508) 362-5080
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 111266 (MA)

Record details

NPI number1174572853
Entity typeIndividual (Type 1)
GenderMale
Credentials LICSW
Sole proprietorNo
NPI enumeratedMay 9, 2006
Last updated in NPPESJuly 13, 2026

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