Karen Niedermier, APRN, CNP
NPI 1821058421 · Family Nurse Practitioner · Superior, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Niedermier, APRN, CNP is a Family Nurse Practitioner provider in Superior, WI (NPI 1821058421).
Provider details
- NPI number
- 1821058421
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, CNP
- Sex
- Female
- Sole proprietor
- No
- License
- CNP1825 (MN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
100 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 61 | $53 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $78 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 | $67 |
Typical Medicare-allowed amounts for these services range $53–$78 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 49 | 48 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 29 | 29 |
| Doxycycline Monohydrate | 24 | 24 |
| Cefadroxil | 20 | 20 |
| Azithromycin | 19 | 19 |
| Ciprofloxacin Hcl | 14 | 14 |
| Polymyxin B Sulf/Trimethoprimbrand: Polymyxin B Sul-Trimethoprim | 13 | 13 |
Practice location
Mailing address
Additional practice locations (1)
- 400 E 3rd StDuluth, MN 55805-1951Phone: (218) 786-8364
Registry dates
- Enumerated
- 2006-03-27
- Last updated
- 2018-10-30
Frequently asked questions
- What is Karen Niedermier's NPI number?
- Karen Niedermier's National Provider Identifier (NPI) is 1821058421, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Niedermier's specialty?
- Karen Niedermier is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen Niedermier located?
- Karen Niedermier's practice location on file with NPPES is 2202 E 2nd St Ste 377, Superior, WI 54880-3778.
- What is Karen Niedermier's phone number?
- The practice phone number listed in the NPPES registry for Karen Niedermier is (715) 817-7990.
- Does Karen Niedermier accept Medicare?
- Karen Niedermier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Niedermier's NPI active?
- Yes — Karen Niedermier's NPI (1821058421) is active in the NPPES registry as of the last update on 2018-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.