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

Mr. Gregory A. Aleff, LCSW

Individual provider Clinical Social Worker · NPI 1942245592

Mr. Gregory A. Aleff, LCSW is a Clinical Social Worker in Appleton, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

Licensed in
WI
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.

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Practice location Address checks out

10 Tri Park Way
Appleton, WI 54914-1658
Phone: (920) 831-7909
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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 962-123 (WI)

Record details

NPI number1942245592
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedJune 18, 2006
Last updated in NPPESJuly 13, 2026
Mailing addressW6031 Blazing Star Dr, Appleton, WI 54915-7422

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