Karen C. Knaak, APN
NPI 1396254728ActiveIndividual· Nurse Practitioner· Peoria, IL
Nurse Practitioner (APN) with Osf Multi-Specialty Group, practicing in Peoria, Illinois. Their prescriptions cost Medicare Part D more than their services did: $309,361 for 1,133 claims, against $47,219 paid for services in 2024. Lilly USA, LLC was the largest of 4 companies reporting payments in 2025, $436.73 in all, mostly food and beverage. Lists Saint Francis Medical Center as a hospital affiliation.
Overview
| NPI | 1396254728 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APN |
| Sole proprietor | No |
| NPI issued | Sep 28, 2017 |
| Last updated in NPPES | Jul 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 209015907 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 519 |
|---|---|
| Services billed | 635 across 8 procedure codes |
| Paid by Medicare | $47,219 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,133 · 2,761 30-day fills |
|---|---|
| Patients | 384 |
| Total drug cost | $309,361 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Osf Multi-Specialty GroupMorton, IL · 2,114 clinicians
Hospital affiliation
- Saint Francis Medical CenterPeoria, IL
Industry payments (Open Payments)
- 2025$436.73 · 4 payments from 4 companies
- 2024$430.26 · 6 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $121.18 | 1 |
| Scpharmaceuticals Inc. | $111.66 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $106.79 | 1 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $97.10 | 1 |
What the 2025 payments were for
- Food and Beverage$436.73 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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