Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mary Eileen O'Sullivan, LCSW

Individual provider Clinical Social Worker · NPI 1417660168

Mary Eileen O'Sullivan, LCSW is a Clinical Social Worker in St Charles, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2022
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

905 Manley Rd
St Charles, IL 60174-5561
Phone: (630) 624-9620
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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 149.024800 (IL)

Record details

NPI number1417660168
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedDecember 27, 2022
Last updated in NPPESMay 21, 2024
Certification dateMay 21, 2024

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