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

Dr. Philip Charles Liethen, PHD

Individual provider Clinical Neuropsychologist · NPI 1689659526

Dr. Philip Charles Liethen, PHD is a Clinical Neuropsychologist in Fort Gratiot, Michigan. Licensed in Michigan and Wisconsin. Registered with an NPI since 2005.

Licensed in
MI, WI
In the registry since
2005
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.

See every abbreviation used in this directory →

Practice location Address checks out

2616 Whitney Pl
Fort Gratiot, MI 48059-3952
Phone: (586) 246-5746
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 3063 (MI)
Clinical Neuropsychologist Taxonomy 103G00000X · Licence 2082 (WI)

Record details

NPI number1689659526
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedDecember 14, 2005
Last updated in NPPESJuly 13, 2026