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

Individual provider Clinical Psychologist · NPI 1134887516

Dr. John Alexander Harrow, PHD is a Clinical Psychologist in Naperville, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2021
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

400 E Diehl Rd Ste 440
Naperville, IL 60563-1358
Phone: (630) 225-9019
Fax: (844) 376-0919
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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 071.010658 (IL)

Record details

NPI number1134887516
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedDecember 2, 2021
Last updated in NPPESMay 4, 2026
Certification dateMay 4, 2026

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