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

John Thomassen, PHD

Individual provider Psychologist · NPI 1881747020

John Thomassen, PHD is a Psychologist in Rochester, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2007
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

103 White Spruce Blvd
Rochester, NY 14623-1610
Phone: (585) 292-5830
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 009938-1 (NY)

Record details

NPI number1881747020
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedJanuary 19, 2007
Last updated in NPPESJuly 9, 2007

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