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

Dr. Katherine Perry Blumstein, PHD

Individual provider Clinical Psychologist · NPI 1174484323

Dr. Katherine Perry Blumstein, PHD is a Clinical Psychologist in Mercer Island, Washington. Practices as a sole proprietor. Licensed in Washington.

Licensed in
WA
In the registry since
2025
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

8241 SE 30th St
Mercer Island, WA 98040-3005
Phone: (206) 465-9657
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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 PY61434956 (WA)

Record details

NPI number1174484323
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedNovember 18, 2025
Last updated in NPPESNovember 18, 2025
Certification dateNovember 18, 2025

Other providers in Mercer Island