Brett Riederman, MD
NPI 1003375254ActiveIndividual· Internal Medicine· Northbrook, IL
Opted out of Medicare from October 2025 to October 2027. Internal Medicine (MD) in Northbrook, Illinois, licensed in IL, with an NPI issued in March 2019. Janssen Biotech, Inc. was the largest of 11 companies reporting payments in 2025, $1,184 in all, mostly food and beverage.
Overview
| NPI | 1003375254 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 18, 2019 |
| Last updated in NPPES | Nov 19, 2025 |
| Certified by provider | Nov 19, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 125.073830 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Oct 3, 2025 – Oct 3, 2027 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Industry payments (Open Payments)
- 2025$1,184 · 46 payments from 11 companies
- 2024$99.27 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $333.30 | 10 |
| Abbvie Inc. | $189.62 | 10 |
| Takeda Pharmaceuticals U.S.A., Inc. | $127.70 | 6 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $96.41 | 4 |
| Cook Medical LLC | $90.45 | 1 |
What the 2025 payments were for
- Food and Beverage$1,184 · 46 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 internal medicine physicians in Northbrook · All internal medicine physicians in Illinois