Marc L. Wiener, M.D.
NPI 1861435927ActiveIndividual· Internal Medicine· Carol Stream, IL
Internal Medicine (M.D.) in Carol Stream, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $121,603 for 750 claims, against $22,105 paid for services in 2024.
Overview
| NPI | 1861435927 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 14, 2006 |
| Last updated in NPPES | Feb 19, 2020 |
| Certified by provider | Feb 19, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036076864 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 39 |
|---|---|
| Services billed | 283 across 19 procedure codes |
| Paid by Medicare | $22,105 |
Part D prescriptions in 2024
| Prescriptions (claims) | 750 · 2,067 30-day fills |
|---|---|
| Patients | 38 |
| Total drug cost | $121,603 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
Other facilities
- Avesena Home Health CareHome health agency · Addison, 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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