Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katie J Rettler, APNP

Nurse Practitioner in Marinette, WI · enumerated 2012.

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

National Provider Identifier

1225301039

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Registry record

Entity type Individual (Type 1)

Name Katie J Rettler

Credential APNP

Sex Female

Practice address 2820 Roosevelt Rd, Marinette, WI, 54143

Phone (715) 735-5225

Fax (715) 735-5388

Enumeration date Feb 10, 2012

Last updated in NPPES Oct 27, 2020

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6311-33 (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

Where does Katie Rettler practice?

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

What is the NPI number for Katie Rettler?

The National Provider Identifier (NPI) for Katie Rettler is 1225301039, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-27.