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

Dr. Roy W. Johnson, PHD

Individual provider Psychologist · NPI 1932448867

Dr. Roy W. Johnson, PHD is a Psychologist in Vacaville, California. Licensed in California. Registered with an NPI since 2013.

Licensed in
CA
In the registry since
2013
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

1600 California Dr
Vacaville, CA 95656-2000
Phone: (707) 448-6841
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY17332 (CA)

Record details

NPI number1932448867
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedFebruary 13, 2013
Last updated in NPPESFebruary 13, 2013
Mailing address31 Elmview Way, Novato, CA 94949-7224

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