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

Robert A. Williams, PHD

Individual provider Psychologist · NPI 1669614723

Robert A. Williams, PHD is a Psychologist in South San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2009
Specialties on file
6
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

1115 Mission Rd
South San Francisco, CA 94080-1302
Phone: (415) 509-6734
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 21573 (CA)
Addiction (Substance Use Disorder) Psychologist Taxonomy 103TA0400X · Licence 21573 (CA)
Clinical Psychologist Taxonomy 103TC0700X · Licence 21573 (CA)
Counseling Psychologist Taxonomy 103TC1900X · Licence 21573 (CA)
Clinical Child & Adolescent Psychologist Taxonomy 103TC2200X · Licence 21573 (CA)
Family Psychologist Taxonomy 103TF0000X · Licence 21573 (CA)

Record details

NPI number1669614723
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedApril 3, 2009
Last updated in NPPESApril 3, 2009

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