Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Heidi Lynn Grondahl, WHNP-BC

Women's Health Nurse Practitioner in Williston, ND · enumerated 2010.

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

National Provider Identifier

1619281987

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Registry record

Entity type Individual (Type 1)

Name Ms. Heidi Lynn Grondahl

Credential WHNP-BC

Sex Female

Practice address 1321 W Dakota Pkwy, Williston, ND, 58801

Phone (701) 572-7711

Fax (701) 572-2283

Enumeration date Jul 29, 2010

Last updated in NPPES Mar 25, 2022

Taxonomy & licenses

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R-198574-2 (MN) Secondary

363LW0102X Women's Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R31608 (ND) 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 Heidi Grondahl practice?

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

What is the NPI number for Heidi Grondahl?

The National Provider Identifier (NPI) for Heidi Grondahl is 1619281987, 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 2022-03-25.