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

Individual provider Clinical Psychologist · NPI 1497780332

William Rvemke Knowlton, PHD is a Clinical Psychologist in Atascadero, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
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

10333 El Camino Real
Atascadero, CA 93422-5808
Phone: (805) 468-2000
Fax: (805) 466-6011
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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 PSY10469 (CA)
Forensic Psychologist Taxonomy 103TF0200X · Licence PSY10469 (CA)

Record details

NPI number1497780332
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJuly 11, 2006
Last updated in NPPESSeptember 11, 2025

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