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Grayline Clinical Drug Trials

Psychologist in Wichita Falls, TX · enumerated 2007 · authorized official Jack Tomlinson, Medical Director.

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

National Provider Identifier

1508073883

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Registry record

Entity type Organization (Type 2)
Legal business name Grayline Clinical Drug Trials
Practice address 3300 Seymour Hwy, Wichita Falls, TX, 76309
Phone (940) 322-1131
Fax (940) 322-4953
Enumeration date May 17, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

103T00000X Psychologist Behavioral Health & Social Service Providers · License C6537 (TX) Primary

Authorized official

Name Jack Tomlinson
Title Medical Director
Phone (940) 322-1131

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

What type of organization is Grayline Clinical Drug Trials?
Grayline Clinical Drug Trials is registered in NPPES as a Psychologist (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.