Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Floyd Joseph O'Brien, PHD

Individual provider Psychologist · NPI 1720021975

Dr. Floyd Joseph O'Brien, PHD is a Psychologist in Stockton, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
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

33 W Alder St
Stockton, CA 95204-5701
Phone: (209) 466-9159
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY6749 (CA)

Record details

NPI number1720021975
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedJune 14, 2006
Last updated in NPPESFebruary 7, 2013
Mailing address33 W Alder St, Stockton, CA 95204-5701

Other providers in Stockton