Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. Barrett Williams, PHD

Individual provider Counseling Psychologist · NPI 1154474054

Mr. Barrett Williams, PHD is a Clinical Psychologist in Tulsa, Oklahoma. Qualified in 2023, 3 years ago. Practices with Oklahoma State University, a 112-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
3
Licensed in
OK
In the registry since
2007
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

5310 E 31st St Ste 13
Tulsa, OK 74135-5013
Phone: (918) 236-4000
Fax: (918) 236-4001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Health Service Psychologist (primary) Taxonomy 103TH0100X · Licence 1466 (OK)
Counseling Psychologist Taxonomy 103TC1900X · Licence 1466 (OK)

Record details

NPI number1154474054
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJanuary 22, 2007
Last updated in NPPESSeptember 25, 2024
Certification dateSeptember 25, 2024
Mailing address5310 E 31st St Ste 13, Tulsa, OK 74135-5013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Oklahoma State University — 112 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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