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

Individual provider Clinical Psychologist · NPI 1427115542

Dr. John Thomas Nickens, PHD is a Clinical Psychologist in Oakland, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
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

465 34th St
Oakland, CA 94609-2815
Phone: (510) 287-9456
Fax: (519) 382-9716
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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 PSY14670 (CA)

Record details

NPI number1427115542
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedJanuary 2, 2007
Last updated in NPPESJuly 8, 2007

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