William O Thomason, PH.D
William O Thomason is a Family Psychologist provider (Psychologist) practicing in Terrell, TX, registered in the NPPES registry with NPI 1912069543 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1912069543 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | William O Thomason |
| Credential | PH.D |
| Sex | Male |
| Practice address | 1200 E BRIN ST, Terrell, TX, 75160 |
| Phone | 9725518826 |
| Enumeration date | 2006-12-13 |
| Last updated in NPPES | 2025-09-11 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TA0400X | Addiction (Substance Use Disorder) Psychologist | Secondary | 25481 | TX |
| 103TC0700X | Clinical Psychologist | Secondary | 25481 | TX |
| 103TF0000X | Family Psychologist | Primary | 25481 | TX |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: William Thomason, PH.D NPI: 1912069543 Taxonomy: 103TF0000X (Family Psychologist) Address: 1200 E BRIN ST, Terrell, TX, 75160
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1033036660 | Lindsey White | Individual | Student in an Organized Health Care Education/Training Program | Terrell, TX |
| 1992713119 | Health and Human Services Commission | Organization | Psychiatric Hospital | Terrell, TX |
| 1740299775 | Health and Human Services Commission | Organization | Long Term Care Pharmacy | Terrell, TX |
| 1689769135 | Paul Nelson | Individual | Dentist | Terrell, TX |
| 1033204912 | Edward Weidow | Individual | Psychiatry Physician | Terrell, TX |
| 1952498586 | Brandi Ragsdale | Individual | Clinical Psychologist | Terrell, TX |
| 1508954074 | William Freeman | Individual | Clinical Psychologist | Terrell, TX |
| 1245329234 | Anthony Claxton | Individual | Psychiatry Physician | Terrell, TX |
Verify this record
Cross-check NPI 1912069543 against the authoritative CMS record: view William O Thomason on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-09-11.