Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Heather Joy Tietjen, NP

Nurse Practitioner in Sioux Falls, SD · enumerated 2006.

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

National Provider Identifier

1639148901

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Registry record

Entity type Individual (Type 1)

Name Mrs. Heather Joy Tietjen

Credential NP

Sex Female

Practice address 1309 W 17th St, Sioux Falls, SD, 57104

Phone (605) 328-6001

Enumeration date Mar 17, 2006

Last updated in NPPES Dec 3, 2025

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R1353060 (MN) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License CP000856 (SD) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP credential

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 1639148901 active?

Yes, as of the latest NPPES snapshot, NPI 1639148901 is active (record last updated 2025-12-03).

How do I verify Heather Tietjen's NPI record?

Cross-check NPI 1639148901 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-03.