Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katheryn D. Mueller, LSW

Social Worker in Sandusky, OH · enumerated 2017.

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

National Provider Identifier

1336665447

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Registry record

Entity type Individual (Type 1)

Name Katheryn D. Mueller

Credential LSW

Sex Female

Practice address 1845 Superior St, Sandusky, OH, 44870

Phone (149) 502-1050

Enumeration date Aug 21, 2017

Last updated in NPPES Aug 21, 2017

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License S29987 (OH) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Katheryn Mueller practice?

The practice location on file with NPPES is in Sandusky, OH. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Katheryn Mueller?

The National Provider Identifier (NPI) for Katheryn Mueller is 1336665447, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-08-21.