Clayton R. Malaker, M.D.
NPI 1144221961ActiveIndividual· Family Medicine· Belvidere, IL
Family Medicine (M.D.) in Belvidere, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $745,354 for 10,443 claims, against $159,199 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 13 companies reporting payments in 2025, $1,132 in all, mostly food and beverage.
Overview
| NPI | 1144221961 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 2, 2005 |
| Last updated in NPPES | Mar 16, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036075458 | 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 - Family Practice (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 239 |
|---|---|
| Services billed | 9,908 across 83 procedure codes |
| Paid by Medicare | $159,199 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,443 · 23,200 30-day fills |
|---|---|
| Patients | 488 |
| Total drug cost | $745,354 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Family Practice |
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Saint Anthony Medical CenterRockford, IL
- Uw HealthRockford, IL
Other facilities
- 2 Sisters Home Healthcare IncHome health agency · Rockford, IL
- Osf Healthcare Home CareHome health agency · Loves Park, IL
Industry payments (Open Payments)
- 2025$1,132 · 70 payments from 13 companies
- 2024$943.84 · 65 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $403.31 | 21 |
| Glaxosmithkline, LLC. | $161.87 | 22 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $121.76 | 6 |
| Novo Nordisk Inc | $66.72 | 3 |
| Exact Sciences Corporation | $65.19 | 3 |
What the 2025 payments were for
- Food and Beverage$1,132 · 70 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 31 family medicine physicians in Belvidere · All family medicine physicians in Illinois