Clay O. Demattei I, MD
NPI 1881621910ActiveIndividual· Surgery· Marion, IL
Surgery (MD) in Marion, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1981). In 2024 Medicare paid $51,338 for 209 patients, and Part D covered 193 of their prescriptions, 84% of them generic.
Overview
| NPI | 1881621910 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Jan 5, 2021 |
| Certified by provider | Jan 5, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 036072552 | 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 - General Surgery (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 209 |
|---|---|
| Services billed | 467 across 41 procedure codes |
| Paid by Medicare | $51,338 |
Part D prescriptions in 2024
| Prescriptions (claims) | 193 · 258 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $2,379 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | General Surgery |
Hospital affiliation
- Heartland Regional Medical CenterMarion, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 15 general surgeons in Marion · All general surgeons in Illinois