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

Individual provider Clinical Social Worker · NPI 1851560338

Kelli Mastellon, LMSW is a Clinical Social Worker in Seaford, New York. Practices as a sole proprietor. Licensed in New York.

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

2146 Jackson Ave
Seaford, NY 11783-2606
Phone: (516) 221-3030
Fax: (516) 221-4160
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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 075340-1 (NY)

Record details

NPI number1851560338
Entity typeIndividual (Type 1)
GenderFemale
Credentials LMSW
Sole proprietorYes
NPI enumeratedFebruary 28, 2008
Last updated in NPPESFebruary 28, 2008

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