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

Dr. Mark Thomas Summerson, PHD

Individual provider Psychologist · NPI 1932122934

Dr. Mark Thomas Summerson, PHD is a Psychologist in Pullman, Washington. Licensed in Washington. Registered with an NPI since 2006.

Licensed in
WA
In the registry since
2006
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

254 E Main St Ste 226
Pullman, WA 99163-2678
Phone: (509) 330-5456
Fax: (509) 561-6229
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence WA2258 (WA)

Record details

NPI number1932122934
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESApril 6, 2016
Mailing address254 E Main St, Suite 226, Pullman, WA 99163-2678

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