Quick answers
- Where does Timothy Callahan see patients?
- Medicare's clinician data lists 1 practice location in Yellow Springs, OH. Call before your visit to confirm the address.
- What is Timothy Callahan's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Timothy Callahan accept Medicare assignment?
- Yes. Medicare's clinician data says Timothy Callahan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Timothy Callahan?
- (937) 767-9171, as listed in official Medicare / NPI Registry data.
- What is Timothy Callahan's NPI number?
- 1861850026. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Timothy Callahan is enrolled with Medicare (CMS data updated 2026-10-02).
- 416 Xenia AveYellow Springs, OH 45387 (937) 767‑9171
Group practices
Medicare enrollment lists Timothy Callahan as a member of this group (CMS data updated 2026-10-02).
- Layh and Associates Inc15 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Yellow Springs
Clinicians with the same Medicare primary specialty in Yellow Springs, OH — not a recommendation.
Clinician information
| Credential | PSY |
|---|---|
| Medical school | Wright State University Boonshoft School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1861850026 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians