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

Dr. Whitney Denay Gilkey Mathison, PHD, LPC, NCC

Professional Counselor in The Colony, TX · enumerated 2009 · practices at Tekeilla Darden Phd Pllc.

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

National Provider Identifier

1851625305

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Registry record

Entity type Individual (Type 1)
Name Dr. Whitney Denay Gilkey Mathison
Credential PHD, LPC, NCC
Sex Female
Practice address The Colony, TX, 75056
Phone (314) 301-9895
Enumeration date Sep 30, 2009
Last updated in NPPES Dec 16, 2025

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

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 80868 (TX) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 80868 (TX) Secondary
101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 2006036529 (MO) Secondary
101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 2006036529 (MO) 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.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Whitney Mathison?
Whitney Mathison is registered in NPPES with the primary taxonomy of Professional Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-16.