Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cynthia A Liethen, APNP

Nurse Practitioner in Fond Du Lac, WI · enumerated 2012.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1932459492

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Registry record

Entity type Individual (Type 1)

Name Cynthia A Liethen

Credential APNP

Sex Female

Practice address 420 E Division St, Fond Du Lac, WI, 54935

Phone (920) 926-5666

Enumeration date Sep 12, 2012

Last updated in NPPES Dec 31, 2020

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4960 (WI) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Cynthia Liethen?

The National Provider Identifier (NPI) for Cynthia Liethen is 1932459492, a Type 1 (individual) record in the CMS NPPES registry.

Where does Cynthia Liethen practice?

The practice location on file with NPPES is in Fond Du Lac, WI. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-31.