Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Thomas Ruf, PH.D.

Counseling Psychologist in Hilliard, OH · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689698136

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Registry record

Entity type Individual (Type 1)

Name Thomas Ruf

Credential PH.D.

Sex Male

Practice address Hilliard, OH, 43026

Phone (614) 406-5336

Fax (614) 752-0385

Enumeration date Jul 27, 2006

Last updated in NPPES Nov 8, 2013

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 4924 (OH) Primary

PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Thomas Ruf's NPI record?

Cross-check NPI 1689698136 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689698136 active?

Yes — as of the latest NPPES snapshot, NPI 1689698136 is active (record last updated 2013-11-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-08.