Quick answers
- Which hospitals does Trevor Koslowski work at?
- Medicare's official clinician data lists Trevor Koslowski at 1 hospital: Flambeau Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Trevor Koslowski see patients?
- Medicare's clinician data lists 6 practice locations, including Park Falls, WI and Phillips, WI. Call before your visit to confirm the address.
- What is Trevor Koslowski's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Trevor Koslowski accept Medicare assignment?
- Yes. Medicare's clinician data says Trevor Koslowski 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 Trevor Koslowski?
- (715) 762-2449, as listed in official Medicare / NPI Registry data.
- What is Trevor Koslowski's NPI number?
- 1437035110. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Trevor Koslowski works
Medicare's Facility Affiliation Data lists Trevor Koslowski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Flambeau HospitalPark Falls, WI · Critical Access Hospital · CCN 521325
Practice locations
Addresses where Trevor Koslowski is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 250 Lawrence AvePark Falls, WI 54552 (715) 762‑2449
- 354 Linden StPark Falls, WI 54552 (844) 305‑9248
- 541 S Lake AvePhillips, WI 54555 (715) 339‑6201
- 595 Peterson DrPhillips, WI 54555 (715) 339‑3113
- 615 Peterson AvePhillips, WI 54555 (715) 339‑6284
Group practices
Medicare enrollment lists Trevor Koslowski as a member of this group (CMS data updated 2026-10-02).
- Flambeau Hospital, Inc.38 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437035110 |
| 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