Eric P. Xanthopoulos, MD
NPI 1457693079ActiveIndividual· Radiology, Radiation Oncology· Beloit, WI
Radiology, Radiation Oncology (MD) in Beloit, Wisconsin, trained at Columbia University College of Physicians and Surgeons (class of 2003). 181 Medicare patients in 2024, $228,885 paid; nearly all of their 687 Part D prescriptions were generic (94%). Janssen Biotech, Inc. was the largest of 17 companies reporting payments in 2025, $548.40 in all, mostly food and beverage.
Overview
| NPI | 1457693079 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 21, 2013 |
| Last updated in NPPES | Mar 31, 2021 |
| Certified by provider | Mar 31, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 68909-20 | WI |
| Radiology, Radiation Oncology | 2085R0001X | 036-146949 | IL |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Radiation Oncology (IL); Practitioner - Radiation Oncology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 181 |
|---|---|
| Services billed | 3,920 across 28 procedure codes |
| Paid by Medicare | $228,885 |
Part D prescriptions in 2024
| Prescriptions (claims) | 687 · 804 30-day fills |
|---|---|
| Patients | 173 |
| Total drug cost | $17,072 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Radiation Oncology |
Medical groups
- Swedishamerican HospitalBelvidere, IL · 389 clinicians
- Beloit Health System IncBeloit, WI · 135 clinicians
Hospital affiliations
- Beloit Health SystemBeloit, WI
- Uw HealthRockford, IL
Other facilities
- Beloit Regional HospiceHospice · Beloit, WI
Industry payments (Open Payments)
- 2025$548.40 · 26 payments from 17 companies
- 2024$406.48 · 17 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $75.11 | 3 |
| Astellas Pharma US Inc | $63.35 | 3 |
| Novartis Pharmaceuticals Corporation | $53.82 | 3 |
| Abbvie Inc. | $53.08 | 2 |
| Pfizer Inc. | $39.37 | 2 |
What the 2025 payments were for
- Food and Beverage$548.40 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records