Robert De Wilton Marsh, MD
NPI 1174564116ActiveIndividual· Internal Medicine, Medical Oncology· Evanston, IL
Internal Medicine, Medical Oncology (MD) in Evanston, Illinois, licensed in IL, with an NPI issued in June 2006. Their prescriptions cost Medicare Part D more than their services did: $202,732 for 206 claims, against $22,759 paid for services in 2024. Genentech USA, Inc. was the largest of 2 companies reporting payments in 2025, $44.88 in all, mostly food and beverage.
Overview
| NPI | 1174564116 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 9, 2006 |
| Last updated in NPPES | Feb 12, 2021 |
| Certified by provider | Feb 12, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 036061670 | 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 - Medical Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 128 |
|---|---|
| Services billed | 339 across 6 procedure codes |
| Paid by Medicare | $22,759 |
Part D prescriptions in 2024
| Prescriptions (claims) | 206 · 248 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $202,732 |
| Generic share | 78% of claims |
Industry payments (Open Payments)
- 2025$44.88 · 2 payments from 2 companies
- 2024$2,164 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech USA, Inc. | $24.50 | 1 |
| Beigene USA, Inc. | $20.38 | 1 |
What the 2025 payments were for
- Food and Beverage$44.88 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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