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

Dr. John George Duffy, PSYD

Individual provider Clinical Psychologist · NPI 1467023242

Dr. John George Duffy, PSYD is a Clinical Psychologist in LA Grange, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2021
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

See every abbreviation used in this directory →

Practice location Address checks out

10 W Calendar Ave Ste D
LA Grange, IL 60525
Phone: (847) 951-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence 36-4398657 (IL)

Record details

NPI number1467023242
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorYes
NPI enumeratedJuly 2, 2021
Last updated in NPPESJuly 2, 2021
Certification dateJuly 2, 2021

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