Quick answers
- Which hospitals does Heidi Grondahl work at?
- Medicare's official clinician data lists Heidi Grondahl at 2 hospitals: CHI St Alexius Health Williston and Sanford Medical Center Bismarck. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Heidi Grondahl see patients?
- Medicare's clinician data lists 1 practice location in Williston, ND. Call before your visit to confirm the address.
- What is Heidi Grondahl's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Heidi Grondahl accept Medicare assignment?
- Yes. Medicare's clinician data says Heidi Grondahl accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Heidi Grondahl?
- (701) 774-7687, as listed in official Medicare / NPI Registry data.
- What is Heidi Grondahl's NPI number?
- 1619281987. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Heidi Grondahl works
Medicare's Facility Affiliation Data lists Heidi Grondahl at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHI St Alexius Health WillistonWilliston, ND · Critical Access Hospital · CCN 351334
- Sanford Medical Center BismarckBismarck, ND · Acute Care Hospital · CCN 350015
Practice locations
Addresses where Heidi Grondahl is enrolled with Medicare (CMS data updated 2026-10-02).
- 1700 11th St WWilliston, ND 58801 (701) 774‑7687
Group practices
Medicare enrollment lists Heidi Grondahl as a member of this group (CMS data updated 2026-10-02).
- Sanford Bismarck556 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Williston
Clinicians with the same Medicare primary specialty in Williston, ND — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619281987 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians