Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Wyse Niedermier, APRN, CNP

Family Nurse Practitioner in Superior, WI · enumerated 2006.

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

National Provider Identifier

1821058421

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Registry record

Entity type Individual (Type 1)

Name Karen Wyse Niedermier

Credential APRN, CNP

Sex Female

Practice address 2202 E 2nd St Ste 377, Superior, WI, 54880

Phone (715) 817-7990

Enumeration date Mar 27, 2006

Last updated in NPPES Oct 30, 2018

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CNP1825 (MN) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 128436-2 (WI) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 128436-2 (MN) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AK940 (AK) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 5989-33 (WI) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
205D0NI	Other	MN	BCBS
HP20370	Other	MN	HEALTH PARTNERS
111767	Other	MN	UCARE
NA9021026055	Other	MN	PREFERRED ONE
01-12315	Other	MN	MEDICA

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

Is NPI 1821058421 active?

Yes, as of the latest NPPES snapshot, NPI 1821058421 is active (record last updated 2018-10-30).

How do I verify Karen Niedermier's NPI record?

Cross-check NPI 1821058421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-30.