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

Dr. David N Day, PHD

Individual provider Clinical Psychologist · NPI 1245463850

Dr. David N Day, PHD is a Clinical Psychologist in Pleasanton, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2009
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

225 Spring St
Pleasanton, CA 94566-6625
Phone: (925) 846-7768
Fax: (925) 846-2113
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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 PSY7972 (CA)

Record details

NPI number1245463850
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedAugust 30, 2009
Last updated in NPPESAugust 30, 2009
Mailing address225 Spring St, Pleasanton, CA 94566-6625

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