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

Katie Diffay, LCSW

Individual provider Clinical Social Worker · NPI 1780379545

Katie Diffay, LCSW is a Clinical Social Worker in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2023
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

3445 W 85th Pl
Chicago, IL 60652-3780
Phone: (773) 209-8155
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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 149025213 (IL)

Record details

NPI number1780379545
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedApril 7, 2023
Last updated in NPPESApril 7, 2023
Certification dateApril 7, 2023

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