TREVOR KOSLOWSKI
NPI 1437035110
Nurse Practitioner - Gerontology in Park Falls, WI
About Trevor Koslowski NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TREVOR KOSLOWSKI (NPI 1437035110) is an individual gerontology provider in Park Falls, Wisconsin, licensed in Wisconsin (18000) and active in the NPI registry since August 2025. He is enrolled in Medicare PECOS, is affiliated with Flambeau Hospital, and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Trevor Koslowski is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Trevor Koslowski reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Park Falls, WI 54552
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1700963048 (Wisconsin)
- 1,351 clinicians in this Medicare group
Minocqua, WI 54548
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Rice Lake, WI 54868
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Neillsville, WI 54456
- Reassigned Medicare billing, Wisconsin enrollment
- 1,440 clinicians in this Medicare group
Waupun, WI 53963
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Flambeau Hospital
Critical Access Hospitals · Park Falls, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54552 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Trevor Koslowski's NPI number?
The NPI number for Trevor Koslowski is 1437035110. It was assigned to this individual provider in the NPPES registry on August 15, 2025.
Where is Trevor Koslowski located?
Trevor Koslowski practices at 98 Sherry Ave, Park Falls, WI 54552. The listed phone number is (715) 762-2484.
What is Trevor Koslowski's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.
Is Trevor Koslowski enrolled in Medicare?
Yes. Trevor Koslowski is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Trevor Koslowski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Trevor Koslowski reassigns Medicare benefits to 6 organizations: Flambeau Hospital Inc (Park Falls, WI), Mchs Hospitals Inc (Minocqua, WI), Lakeview Medical Center Inc Of Rice Lake (Rice Lake, WI), Marshfield Clinic Inc (Marshfield, WI), Memorial Hospital Inc (Neillsville, WI) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Trevor Koslowski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Trevor Koslowski accept?
Health plans from Anthem Blue Cross and Blue Shield, HealthPartners and Security Health Plan list Trevor Koslowski as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Trevor Koslowski affiliated with any hospitals?
According to CMS data, Trevor Koslowski is affiliated with Flambeau Hospital.
When was this NPI record last updated?
The NPPES record for Trevor Koslowski was last updated on February 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Trevor Koslowski · NPI 1437035110
Gerontology physician in Park Falls, Wisconsin. Individual provider, active in the CMS NPPES registry since August 15, 2025.
## Identity
- **NPI:** 1437035110 (Entity type: Individual)
- **Enumerated:** August 15, 2025
- **Primary specialty:** Nurse Practitioner - Gerontology · taxonomy 363LG0600X
- **State license:** 18000 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 98 SHERRY AVE, Park Falls, WI 54552-1467
- **Phone:** (715) 762-2484
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Flambeau Hospital Inc (NPI 1194317966, Park Falls, WI); Mchs Hospitals Inc (NPI 1942854716, Minocqua, WI); Lakeview Medical Center Inc Of Rice Lake (NPI 1326139049, Rice Lake, WI); Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI); Memorial Hospital Inc (NPI 1346239373, Neillsville, WI); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** February 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1437035110) · Data from the CMS NPPES public registry.