Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. PHILIP CHARLES LIETHEN PHD
NPI 1689659526
Clinical Neuropsychologist in Fort Gratiot, MI

Q: What is Philip Liethen's NPI number?

The NPI number for Philip Liethen is 1689659526. It was assigned to this individual provider in the NPPES registry on December 14, 2005.

Q: What is Philip Liethen's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Q: When was this NPI record last updated?

The NPPES record for Philip Liethen was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since December 14, 2005

2616 WHITNEY PL, FORT GRATIOT, MI 48059(586) 246-5746 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Philip Charles Liethen Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. PHILIP CHARLES LIETHEN PHD (NPI 1689659526) is an individual clinical neuropsychologist in Fort Gratiot, Michigan, licensed in Michigan (3063) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1689659526

Entity TypeIndividualMale

Primary Taxonomy103G00000X

Provider Legal NameDR. PHILIP CHARLES LIETHENCredential: PHD

Location Address2616 WHITNEY PLFort Gratiot, MI 48059-3952

Mailing Address2616 Whitney PlFort Gratiot, MI 48059-3952 · (586) 246-5746

Phone(586) 246-5746

Sole ProprietorNo

Enumeration DateDecember 14, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1689659526 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers

Taxonomy Code103G00000X

Licenses✔ Licensed in MI · 3063✔ Licensed in WI · 2082

Definition

A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.

2616 WHITNEY PL, Fort Gratiot, MI 48059

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Philip Liethen's NPI number?

The NPI number for Philip Liethen is 1689659526. It was assigned to this individual provider in the NPPES registry on December 14, 2005.

Where is Philip Liethen located?

Philip Liethen practices at 2616 Whitney Pl, Fort Gratiot, MI 48059. The listed phone number is (586) 246-5746.

What is Philip Liethen's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

When was this NPI record last updated?

The NPPES record for Philip Liethen was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.