Darren Michael Brenner, M.D.
NPI 1003997875ActiveIndividual· Internal Medicine, Gastroenterology· Chicago, IL
Internal Medicine, Gastroenterology (M.D.) in Chicago, Illinois, trained at University of Chicago, Pritzker School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $530,855 for 1,312 claims, against $77,019 paid for services in 2024. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 5 companies reporting payments in 2025, $186,532 in all, mostly speaking and faculty fees.
Overview
| NPI | 1003997875 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 18, 2006 |
| Last updated in NPPES | Jun 26, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036120505 | 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 - Gastroenterology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 469 |
|---|---|
| Services billed | 896 across 33 procedure codes |
| Paid by Medicare | $77,019 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,312 · 2,189 30-day fills |
|---|---|
| Patients | 388 |
| Total drug cost | $530,855 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
- Palos Community HospitalPalos Heights, IL
Other facilities
- Shirley Ryan AbilitylabInpatient rehabilitation facility · Chicago, IL
Industry payments (Open Payments)
- 2025$186,532 · 158 payments from 5 companies
- 2024$165,826 · 163 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $75,150 | 69 |
| Ardelyx, Inc. | $61,822 | 52 |
| Abbvie Inc. | $49,329 | 34 |
| Madrigal Pharmaceuticals | $142.72 | 1 |
| Phathom Pharmaceuticals, Inc. | $87.88 | 2 |
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$161,409 · 50 payments
- Consulting Fee$10,850 · 4 payments
- Travel and Lodging$10,142 · 57 payments
- Food and Beverage$4,132 · 47 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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