KAREN WYSE NIEDERMIER APRN, CNP
NPI 1821058421
Nurse Practitioner - Family in Superior, WI
About Karen Wyse Niedermier Aprn, Cnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN WYSE NIEDERMIER APRN, CNP (NPI 1821058421) is an individual family provider in Superior, Wisconsin, licensed in Wisconsin (5989-33) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Essentia Health St Mary's Medical Center, and maintains a secondary practice location in Duluth.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Other Identifiers 5
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
Karen Wyse Niedermier Aprn, Cnp 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
5Medicare enrollment records show Karen Niedermier reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Superior, WI 54880
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: St Marys Hospital Of Superior
- Also billed through NPI 1083657886 (Wisconsin)
- 381 clinicians in this Medicare group
Superior, WI 54880
- Reassigned Medicare billing, Wisconsin and Minnesota enrollments
- Also billed through NPI 1730028770 (Minnesota)
- 174 clinicians in this Medicare group
Duluth, MN 55805
- Reassigned Medicare billing, Minnesota enrollment
- 179 clinicians in this Medicare group
Moose Lake, MN 55767
- Reassigned Medicare billing, Minnesota enrollment
- 213 clinicians in this Medicare group
Sandstone, MN 55072
- Reassigned Medicare billing, Minnesota enrollment
- 159 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Essentia Health St Mary's Medical Center
Acute Care Hospitals · Duluth, MNEssentia Health Duluth
Acute Care Hospitals · Duluth, MNSt Marys Hospital Superior
Critical Access Hospitals · Superior, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54880 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Karen Niedermier's NPI number?
The NPI number for Karen Niedermier is 1821058421. It was assigned to this individual provider in the NPPES registry on March 27, 2006. The provider is also known as Karen Lynn Wyse.
Where is Karen Niedermier located?
Karen Niedermier practices at 2202 E 2nd St Ste 377, Superior, WI 54880. The listed phone number is (715) 817-7990.
What is Karen Niedermier's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Karen Niedermier enrolled in Medicare?
Yes. Karen Niedermier 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 Karen Niedermier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Niedermier reassigns Medicare benefits to 5 organizations: St. Mary's Hospital Of Superior (Superior, WI), The Duluth Clinic, Ltd (Superior, WI), St Marys Medical Center (Duluth, MN), Essentia Health Moose Lake (Moose Lake, MN) and Pine Medical Center (Sandstone, MN). 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 Karen Niedermier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Niedermier accept?
Health plans from Anthem Blue Cross and Blue Shield, Medica and Sanford Health Plan list Karen Niedermier 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 Karen Niedermier affiliated with any hospitals?
According to CMS data, Karen Niedermier is affiliated with Essentia Health St Mary's Medical Center, Essentia Health Duluth and St Marys Hospital Superior.
When was this NPI record last updated?
The NPPES record for Karen Niedermier was last updated on October 30, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.
# Karen Wyse Niedermier, APRN, CNP · NPI 1821058421
Family physician in Superior, Wisconsin. Individual provider, active in the CMS NPPES registry since March 27, 2006.
## Identity
- **NPI:** 1821058421 (Entity type: Individual)
- **Enumerated:** March 27, 2006
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 5989-33 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2202 E 2ND ST STE 377, Superior, WI 54880-3778
- **Phone:** (715) 817-7990
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): St. Mary's Hospital Of Superior (NPI 1700817079, Superior, WI); The Duluth Clinic, Ltd (NPI 1083889554, Superior, WI); St Marys Medical Center (NPI 1457393035, Duluth, MN); Essentia Health Moose Lake (NPI 1154959880, Moose Lake, MN); Pine Medical Center (NPI 1326041633, Sandstone, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** October 30, 2018
- **Other identifiers:** Other 111767 (MN); Other HP20370 (MN); Other NA9021026055 (MN); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1821058421) · Data from the CMS NPPES public registry.