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
Mailing address769 Amherst Cir, Sonoma, CA 95476-4107

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