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

Charles D Callahan, PHD

Individual provider Clinical Psychologist · NPI 1629086426

Charles D Callahan, PHD is a Clinical Psychologist in Springfield, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
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

701 N 1st St
Springfield, IL 62781-0001
Phone: (217) 788-3000
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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 71004590 (IL)

Record details

NPI number1629086426
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedAugust 4, 2006
Last updated in NPPESJuly 8, 2007
Mailing address701 N 1st St, Springfield, IL 62781-0001

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