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

Individual provider Psychologist · NPI 1073596821

Dr. Luis A Janssen, PHD is a Psychologist in Sonoma, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2005
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

769 Amherst Cir
Sonoma, CA 95476-4107
Phone: (707) 939-1670
Fax: (707) 939-1670
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY8820 (CA)

Record details

NPI number1073596821
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedNovember 25, 2005
Last updated in NPPESMarch 14, 2013

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