Payment overview · 2025
General Payments
$186,532.43
158 reported records · 5 companies
Healthcare provider profile · identity verified
Darren Michael Brenner, M.D.
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · CHICAGO, IL · NPI 1003997875
Verified facts
What the public records show
CMS Open Payments records show Darren Michael Brenner, M.D. received $186,532.43 in general payments during 2025 across 158 reported records.
Salix Pharmaceuticals, a division of Bausch Health US, LLC accounted for 40.3% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 7 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Ibsrela, Linzess, Xifaxan.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 212 claims for Linzess by this doctor in 2024.
Ardelyx, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported IBSRELA as an associated drug or biological on 59980 records involving 18215 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Ibsrela by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported PLENVU as an associated drug or biological on 1016 records involving 359 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Plenvu by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULANCE as an associated drug or biological on 2652 records involving 1501 distinct recipient NPIs. Public Medicare Part D data also shows 53 claims for Trulance by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XIFAXAN as an associated drug or biological on 101901 records involving 33018 distinct recipient NPIs. Public Medicare Part D data also shows 54 claims for Xifaxan by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | Unresolved — no canonical attribution shown | $75,150.45 | 40.3% | 69 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $61,822.17 | 33.1% | 52 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $49,329.21 | 26.4% | 34 | 2025 |
| Madrigal Pharmaceuticals | Unresolved — no canonical attribution shown | $142.72 | 0.1% | 1 | 2025 |
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $87.88 | 0.1% | 2 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $161,408.80 | 50 |
| Consulting Fee | $10,850.00 | 4 |
| Travel and Lodging | $10,141.99 | 57 |
| Food and Beverage | $4,131.64 | 47 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| XIFAXAN Normalized: xifaxan |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $65,096.54 | 64 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $61,822.17 | 52 | 2025 |
Source payment records
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| LINZESS Normalized: linzess |
Drug | ABBVIE INC. | $30,534.44 | 23 | 2025 |
Source payment records
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| VIBERZI Normalized: viberzi |
Drug | ABBVIE INC. | $12,342.77 | 9 | 2025 |
Source payment records
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| REZDIFFRA Normalized: rezdiffra |
Drug | Madrigal Pharmaceuticals | $142.72 | 1 | 2025 |
Source payment records
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| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $87.88 | 2 | 2025 |
Source payment records
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| CREON Normalized: creon |
Drug | ABBVIE INC. | $19.32 | 1 | 2025 |
Source payment records
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* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| IBSRELA ibsrela |
2025 | Ibsrela | 2024 | 15 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| LINZESS linzess |
2025 | Linzess | 2024 | 212 | exact normalized | Medicare Part D |
| XIFAXAN xifaxan |
2025 | Xifaxan | 2024 | 54 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LINZESS open payments reported associated product |
CMS Open Payments — General Payments 87954 supporting records · 21815 recipient NPIs · example record 1201352608 |
Linzess · 2024 Exact normalized brand match · 1 Part D row |
212 | 55 |
| Ardelyx, Inc. Exact reporting entity; no affiliate inference |
2025 | IBSRELA open payments reported associated product |
CMS Open Payments — General Payments 59980 supporting records · 18215 recipient NPIs · example record 1247828901 |
Ibsrela · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | PLENVU open payments reported associated product |
CMS Open Payments — General Payments 1016 supporting records · 359 recipient NPIs · example record 1231776646 |
Plenvu · 2024 Exact normalized brand match · 1 Part D row |
12 | 11 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | TRULANCE open payments reported associated product |
CMS Open Payments — General Payments 2652 supporting records · 1501 recipient NPIs · example record 1231775445 |
Trulance · 2024 Exact normalized brand match · 1 Part D row |
53 | 19 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | XIFAXAN open payments reported associated product |
CMS Open Payments — General Payments 101901 supporting records · 33018 recipient NPIs · example record 1231775337 |
Xifaxan · 2024 Exact normalized brand match · 1 Part D row |
54 | 17 |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Linzess | Linaclotide | 212 | 55 |
| Omeprazole | Omeprazole | 119 | 34 |
| Pantoprazole Sodium | Pantoprazole Sodium | 116 | 41 |
| Peg 3350-Electrolyte | Sodium Chloride/Nahco3/Kcl/Peg | 94 | 90 |
| Motegrity | Prucalopride Succinate | 77 | 23 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 61 | 56 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 59 | 16 |
| Xifaxan | Rifaximin | 54 | 17 |
| Trulance | Plecanatide | 53 | 19 |
| Dicyclomine Hcl | Dicyclomine Hcl | 43 | 14 |
| Dexlansoprazole Dr | Dexlansoprazole | 41 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 41 | 16 |
| Rabeprazole Sodium | Rabeprazole Sodium | 35 | 11 |
| Famotidine | Famotidine | 27 | 13 |
| Ondansetron Odt | Ondansetron | 26 | 13 |
| Metoclopramide Hcl | Metoclopramide Hcl | 22 | suppressed |
| Movantik | Naloxegol Oxalate | 21 | suppressed |
| Pyridostigmine Bromide | Pyridostigmine Bromide | 18 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 15 | suppressed |
| Ibsrela | Tenapanor Hcl | 15 | suppressed |
| Lansoprazole | Lansoprazole | 12 | suppressed |
| Plenvu | Peg3350/Sod Sul/Nacl/Kcl/Asb/C | 12 | 11 |
| Lubiprostone | Lubiprostone | 11 | suppressed |
| Promethazine Hcl | Promethazine Hcl | 11 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $186,532.43 · 158 records | Salix Pharmaceuticals, a division of Bausch Health US, LLC | CREON, IBSRELA, LINZESS, REZDIFFRA, VIBERZI, VOQUEZNA, XIFAXAN | 5 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Ibsrela play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ABBVIE INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error