Eugene R. Ahn, M.D.
NPI 1093911307ActiveIndividual· Internal Medicine, Medical Oncology· Chicago, IL
Internal Medicine, Medical Oncology (M.D.) in Chicago, Illinois, trained at University of Miami, Lm Miller School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $311,159 for 185 claims, against $9,581 paid for services in 2024.
Overview
| NPI | 1093911307 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 23, 2007 |
| Last updated in NPPES | Oct 26, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 036.136519 | IL |
| Internal Medicine, Medical Oncology | 207RX0202X | ME92099 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 101 across 6 procedure codes |
| Paid by Medicare | $9,581 |
Part D prescriptions in 2024
| Prescriptions (claims) | 185 · 246 30-day fills |
|---|---|
| Patients | 60 |
| Total drug cost | $311,159 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Miami, Lm Miller School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Medical Oncology |
Medical group
- Loyola University Medical CenterMaywood, IL · 953 clinicians
Hospital affiliations
- Loyola Gottlieb Memorial HospitalMelrose Park, IL
- Loyola University Medical CenterMaywood, 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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