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

MS. Flo Marshak, LCSW

Individual provider Clinical Social Worker · NPI 1265405641

MS. Flo Marshak, LCSW is a Clinical Social Worker in Smithtown, New York. Licensed in New York. Registered with an NPI since 2006.

Licensed in
NY
In the registry since
2006
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

See every abbreviation used in this directory →

Practice location Address checks out

50 Karl Ave Ste 205
Smithtown, NY 11787
Phone: (631) 724-5500
Fax: (631) 724-5500
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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 R0520641 (NY)

Record details

NPI number1265405641
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedFebruary 8, 2006
Last updated in NPPESJuly 13, 2026
Mailing address50 Karl Ave, Ste 205, Smithtown, NY 11787

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