Quick answers
- Which hospitals does Michelle A. Tretter work at?
- Medicare's official clinician data lists Michelle A. Tretter at 1 hospital: Altru Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michelle A. Tretter see patients?
- Medicare's clinician data lists 2 practice locations, including Grand Forks, ND. Call before your visit to confirm the address.
- What is Michelle A. Tretter's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Michelle A. Tretter accept Medicare assignment?
- Yes. Medicare's clinician data says Michelle A. Tretter 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.
- Does Michelle A. Tretter offer telehealth?
- Medicare's clinician data says Michelle A. Tretter offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Michelle A. Tretter?
- (701) 795-2000, as listed in official Medicare / NPI Registry data.
- What is Michelle A. Tretter's NPI number?
- 1386305845. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michelle A. Tretter works
Medicare's Facility Affiliation Data lists Michelle A. Tretter at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Altru HospitalGrand Forks, ND · Acute Care Hospital · CCN 350019
Practice locations
Addresses where Michelle A. Tretter is enrolled with Medicare (CMS data updated 2026-10-02).
- 1380 S Columbia RdGrand Forks, ND 58201 (701) 795‑2000
- 860 S Columbia RdGrand Forks, ND 58201 (701) 780‑5000
Group practices
Medicare enrollment lists Michelle A. Tretter as a member of this group (CMS data updated 2026-10-02).
- Altru Health System684 clinicians in the group
Specialties
- Clinical Social Workerprimary
Find other clinicians: Clinical Social Worker, North Dakota →
Other clinical social workers in Grand Forks
Clinicians with the same Medicare primary specialty in Grand Forks, ND — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386305845 |
| 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