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

Individual provider Clinical Psychologist · NPI 1861850026

Dr. Timothy Callahan, PSYD is a Clinical Psychologist in Yellow Springs, Ohio. Graduated from Wright State University Boonshoft School of Medicine in 1989, 37 years ago. Practices with Layh and Associates Inc, a 15-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
37
Trained at
Wright State University Boonshoft School of Medicine
Licensed in
OH
In the registry since
2016
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

360 E Enon Rd
Yellow Springs, OH 45387-1415
Phone: (937) 767-1303
Fax: (937) 767-1025
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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 4411 (OH)

Record details

NPI number1861850026
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD
Sole proprietorNo
NPI enumeratedFebruary 3, 2016
Last updated in NPPESFebruary 3, 2016

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolWRIGHT STATE UNIVERSITY BOONSHOFT SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Layh And Associates Inc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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