Eugene F. Yen, MD
NPI 1508944018ActiveIndividual· Internal Medicine, Gastroenterology· Evanston, IL
Internal Medicine, Gastroenterology (MD) in Evanston, Illinois, trained at Tufts University School of Medicine (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $2,680,608 for 742 claims, against $54,503 paid for services in 2024. Janssen Biotech, Inc. was the largest of 7 companies reporting payments in 2025, $59,840 in all, mostly speaking and faculty fees.
Overview
| NPI | 1508944018 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 1, 2006 |
| Last updated in NPPES | Feb 1, 2024 |
| Certified by provider | Feb 1, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036-117818 | 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 - Gastroenterology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 278 |
|---|---|
| Services billed | 452 across 32 procedure codes |
| Paid by Medicare | $54,503 |
Part D prescriptions in 2024
| Prescriptions (claims) | 742 · 1,194 30-day fills |
|---|---|
| Patients | 231 |
| Total drug cost | $2,680,608 |
| Generic share | 60% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$59,840 · 79 payments from 7 companies
- 2024$70,450 · 83 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $54,072 | 66 |
| Celltrion USA Inc. | $4,675 | 3 |
| Abbvie Inc. | $894.26 | 5 |
| Lilly USA, LLC | $158.05 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $17.66 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$48,059 · 15 payments
- Consulting Fee$5,225 · 3 payments
- Travel and Lodging$4,070 · 18 payments
- Food and Beverage$2,477 · 42 payments
- Education$10.48 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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