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

Mary Frances McMahon, LCSW

Individual provider Clinical Social Worker · NPI 1437816378

Mary Frances McMahon, LCSW is a Clinical Social Worker in South Hempstead, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2021
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

509 Willow St
South Hempstead, NY 11550-8018
Phone: (516) 946-3464
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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 070348 (NY)

Record details

NPI number1437816378
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedNovember 28, 2021
Last updated in NPPESNovember 28, 2021
Certification dateNovember 28, 2021

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