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

Mark Williams, PHD

Individual provider Psychologist · NPI 1811020076

Mark Williams, PHD is a Clinical Psychologist in Dallas, Texas. Qualified in 2001, 25 years ago. Licensed in Texas.

Years since qualifying
25
Licensed in
TX
In the registry since
2007
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

18170 Dallas Pkwy Ste 502
Dallas, TX 75287-7151
Phone: (214) 351-6600
Fax: (214) 351-6453
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 32192 (TX)

Record details

NPI number1811020076
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedMarch 14, 2007
Last updated in NPPESJuly 22, 2024
Certification dateJuly 22, 2024
Mailing address16227 Shadybank Dr, Dallas, TX 75248-2958

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Not indicated

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