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

Dr. David K Markley, PHD

Individual provider Clinical Psychologist · NPI 1750452876

Dr. David K Markley, PHD is a Clinical Psychologist in Seattle, Washington. Qualified in 1999, 27 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
27
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

509 Olive Way Ste 204
Seattle, WA 98101-1726
Phone: (206) 329-5255
Fax: (206) 726-1878
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PY00002563 (WA)

Record details

NPI number1750452876
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedNovember 11, 2006
Last updated in NPPESJuly 21, 2022
Certification dateOctober 14, 2021

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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