Timothy Callahan, PSY.D.
Clinical Psychologist · Yellow Springs, OH
Timothy Callahan, PSY.D. is a clinical psychologist with a practice address in Yellow Springs, Ohio, and NPI 1861850026, issued on Feb 3, 2016. Check the license (Ohio 4411, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Timothy Callahan
- Credential
- PSY.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 4411 OH
Self-reported in NPPES; status is on the state search - Practice location
- 360 E Enon RD, Yellow Springs, OH 45387
- Phone
- (937) 767-1303
- Enumerated
- Feb 3, 2016
- Record last updated
- Feb 3, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (937) 767-1025
- Medicare enrollment
- Enrolled (PECOS I20220112001391); accepts Medicare assignment
- Medical or professional school
- Wright State University Boonshoft School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 1,581 in Ohio → Look up another NPI →
Also registered at 360 E Enon RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Timothy Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 4411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Layh And Associates IncYellow Springs, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Callahan among 1,581 clinical psychologist records in Ohio
Timothy Callahan, PSY.D. is one of 1,581 clinical psychologist records with a practice address in Ohio. 19% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 78% of them.
- NPI issued2016 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 19% of these records are
- In the CMS Doctors and Clinicians fileYes · 28% of these records are
- Graduated1989 · median 2002 among the 445 with a school on file
- Record last updated2016 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 clinical psychologist records list a practice address in Yellow Springs
They are 16 of the 176 NPPES records with a practice address in Yellow Springs, and 1,581 clinical psychologist records in Ohio.
All 1,581 in Ohio → Every provider in Yellow Springs → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Robert Barcus, PH.D.Yellow Springs, OH 453871053357483
- Antoinette Cordell, PHDYellow Springs, OH 453871265581524
- Michael Hewett, PH.D.Yellow Springs, OH 453871467472480
- Flora IgahYellow Springs, OH 453871740471952
- Paul Kadis, PSY.D.Yellow Springs, OH 453871912943002
- Ann Koppelman, PSY.D.Yellow Springs, OH 453871306994793
- Melissa Layman-Guadalupe, PH.D.Yellow Springs, OH 453871588681530
- Jeanne Lemkau, PH.D.Yellow Springs, OH 453871730203688
Common questions
What is Timothy Callahan, PSY.D.'s NPI number?
Timothy Callahan, PSY.D.'s National Provider Identifier (NPI) is 1861850026, issued on Feb 3, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Callahan, PSY.D. located?
The NPPES record lists a practice address at 360 E Enon RD, Yellow Springs, OH, 45387. Phone: (937) 767-1303. Providers update this record themselves, so call before visiting.
How can I verify Timothy Callahan, PSY.D.'s license?
NPPES lists Ohio license number 4411, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.