Joseph Bresnahan, MD
Gastroenterology · Riverside, ILNPI 1710925532
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 221 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 21 manufacturers, the largest accounting for just 20.7% — the pattern of someone who eats at a lot of different presentations. 2025 is the largest year on record at $2,118, 5.5 times the $388 reported in 2019.
Across 221 payments — averaging $27.06 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$1K
- Takeda Pharmaceuticals U.S.A., Inc.$1K
- Johnson & Johnson$893
- Ardelyx, Inc.$510
- Pfizer$439
- Bristol Myers Squibb$261
- plus $1K from 15 others
What the payments were for
- Food & beverage$5,981100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AbbVie | 45 | $1,239 |
| Takeda Pharmaceuticals U.S.A., Inc. | 44 | $1,145 |
| Johnson & Johnson | 38 | $893 |
| Ardelyx, Inc. | 21 | $510 |
| Pfizer | 12 | $439 |
| Bristol Myers Squibb | 13 | $261 |
| Madrigal Pharmaceuticals | 3 | $213 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 7 | $169 |
| Merck | 7 | $138 |
| E.r. Squibb & Sons, L.L.C. | 1 | $131 |
| Ipsen Biopharmaceuticals, Inc | 5 | $126 |
| Phathom Pharmaceuticals, Inc. | 3 | $125 |
| Intercept Pharmaceuticals, Inc. | 6 | $114 |
| Janssen Scientific Affairs, LLC | 1 | $110 |
| Gilead | 3 | $78 |
| QOL Medical, LLC | 5 | $71 |
| Boston Scientific | 1 | $68 |
| Aimmune Therapeutics, Inc. | 2 | $51 |
| Covidien LP | 2 | $49 |
| Mauna Kea Technologies, Inc. | 1 | $26 |
| Conmed Corporation | 1 | $25 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$5,981 in reported general payments places this provider in the 75th percentile of 787 gastroenterology providers in Illinois.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Mesalamine | 20 | $17,543 |
| Alosetron Hcl | 25 | $6,273 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 209 | $3,330 |
| Omeprazole | 151 | $1,601 |
| Ursodiol | 11 | $1,326 |
| Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl | 65 | $1,034 |
| Pantoprazole Sodium | 91 | $858 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 33 | $613 |
| Desipramine Hcl | 23 | $607 |
| Famotidine | 63 | $562 |
| Rabeprazole Sodium | 11 | $526 |
| Esomeprazole Magnesium | 22 | $311 |
| Peg 3350-ElectrolyteSodium Chloride/Nahco3/Kcl/Peg | 15 | $283 |
| Trazodone Hcl | 28 | $244 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Riverside
- David RubinChicago$1.5M
- Stephen HanauerChicago$1.4M
- Steven FlammChicago$1.3M
- Amar NaikDes Plaines$1.2M
- Darren BrennerChicago$1.1M
- Jonathan RosenbergGurnee$1M
- Daksesh PatelEvanston$745K
- Russell CohenChicago$690K
- Parambir DulaiChicago$668K
- Christopher ChapmanChicago$645K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.