Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

MS. Heidi Lynn Grondahl, WHNP-BC

Individual provider Women's Health Nurse Practitioner · NPI 1619281987

MS. Heidi Lynn Grondahl, WHNP-BC is a Nurse Practitioner in Williston, North Dakota. Qualified in 2010, 16 years ago. Practices with Sanford Bismarck, a 561-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Minnesota and North Dakota.

Years since qualifying
16
Licensed in
MN, ND
In the registry since
2010
Specialties on file
2
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Practice location Address checks out

1321 W Dakota Pkwy
Williston, ND 58801-3807
Phone: (701) 572-7711
Fax: (701) 572-2283
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1301 15th Ave W, Williston, ND 58801-3821 — (701) 572-7651

Specialties & licences

Women's Health Nurse Practitioner (primary) Taxonomy 363LW0102X · Licence R31608 (ND)
Women's Health Nurse Practitioner Taxonomy 363LW0102X · Licence R-198574-2 (MN)

Record details

NPI number1619281987
Entity typeIndividual (Type 1)
GenderFemale
Credentials WHNP-BC
Sole proprietorNo
NPI enumeratedJuly 29, 2010
Last updated in NPPESMarch 25, 2022
Certification dateMarch 25, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Sanford Bismarck — 561 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients22
Services billed 31 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $34 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Chi St Alexius Health Williston Hospital · Williston, ND
  • Sanford Medical Center Bismarck Hospital · Bismarck, ND

Colleagues at Sanford Bismarck

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 561 clinicians in the practice; 12 are shown here.

Other providers in Williston