William O Thomason, PH.D is a family psychologist in Terrell, TX. The provider is a psychologist whose specialty is founded on principles of systems theory with the interpersonal system of the family the focus of assessment, intervention and research. William O Thomason, PH.D NPI is 1912069543. The provider is registered as an individual entity type. The NPPES NPI record indicates the provider is a male.
The provider's business location address is:
1200 E BRIN ST TERRELL, TX ZIP 75160 Phone: (972) 551-8826
The enumeration date for this NPI number is 12/13/2006 and was last updated on 9/11/2025.
The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:
NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.
This page was last updated on: 11/21/2025
NPI Synchronization or Removal
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