Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ilsa Anne Sieg, FNP-C

Family Nurse Practitioner in Waite Park, MN · enumerated 2015.

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

National Provider Identifier

1275902025

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Registry record

Entity type Individual (Type 1)

Name Ilsa Anne Sieg

Credential FNP-C

Sex Female

Practice address 67 10th Ave S, Waite Park, MN, 56387

Phone (320) 774-1083

Enumeration date Sep 23, 2015

Last updated in NPPES Aug 19, 2016

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CNP4113 (MN) 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

Is NPI 1275902025 active?

Yes, as of the latest NPPES snapshot, NPI 1275902025 is active (record last updated 2016-08-19).

How do I verify Ilsa Sieg's NPI record?

Cross-check NPI 1275902025 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 2016-08-19.