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

Gary S Olsen, PHD

Individual provider Psychologist · NPI 1437232154

Gary S Olsen, PHD is a Psychologist in Marshfield, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

Licensed in
WI
In the registry since
2006
Specialties on file
2
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

1000 N Oak Ave
Marshfield, WI 54449-5703
Phone: (715) 387-5511
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 2641 (WI)
Psychologist Taxonomy 103T00000X · Licence 2641 (WI)

Record details

NPI number1437232154
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedOctober 24, 2006
Last updated in NPPESMay 8, 2023
Certification dateMay 8, 2023
Mailing address1000 N Oak Ave, Marshfield, WI 54449-5703

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