Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Diane K. Kosters, PHD

Individual provider Clinical Neuropsychologist · NPI 1902029275

Dr. Diane K. Kosters, PHD is a Clinical Neuropsychologist in Walnut Creek, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
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

43 Quail Ct Ste 213
Walnut Creek, CA 94596-8702
Phone: (925) 946-9660
Fax: (925) 946-9660
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY7055 (CA)
Clinical Neuropsychologist Taxonomy 103G00000X · Licence PSY7055 (CA)

Record details

NPI number1902029275
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedApril 11, 2007
Last updated in NPPESSeptember 11, 2025

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