Nathan Joseph Siesener, MD
NPI 1295239804ActiveIndividual· Radiology, Diagnostic Radiology· Belleville, IL
Radiology, Diagnostic Radiology (MD) in Belleville, Illinois, trained at University of Missouri, Columbia School of Medicine (class of 2018). Medicare paid $45,677 for services to 1,041 patients in 2024. Teleflex LLC reported $15.87 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1295239804 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 19, 2018 |
| Last updated in NPPES | Oct 21, 2025 |
| Certified by provider | Mar 28, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Diagnostic Radiology Primary | 2085R0202X | 036164864 | 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 - Diagnostic Radiology (GA); Practitioner - Diagnostic Radiology (IL); Practitioner - Diagnostic Radiology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,041 |
|---|---|
| Services billed | 1,401 across 116 procedure codes |
| Paid by Medicare | $45,677 |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Diagnostic Radiology |
Medical groups
- Washington University Physicians in Illinois IncSaint Louis, MO · 175 clinicians
- Clinical Radiologists SCHannibal, MO · 29 clinicians
Hospital affiliations
- Alton Memorial HospitalAlton, IL
- Barnes Jewish HospitalSaint Louis, MO
- Hopedale HospitalHopedale, IL
- Memorial HospitalBelleville, IL
Industry payments (Open Payments)
- 2025$15.87 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teleflex LLC | $15.87 | 1 |
What the 2025 payments were for
- Food and Beverage$15.87 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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