Eugene Chang
Gastroenterology · Burr Ridge, ILNPI 1346302890
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 1 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. Every reported general payment came from a single manufacturer, Ipsen Biopharmaceuticals, Inc. That places this record below the midpoint for gastroenterology clinicians in IL, where the typical reported total is $1,251.
Across 1 payment — averaging $123.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ipsen Biopharmaceuticals, Inc$124
Across 1 payment — averaging $768,874 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Takeda Pharmaceuticals U.S.A., Inc.$769K
What the payments were for
- Food & beverage$124100%
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.
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 |
|---|---|---|
| Ipsen Biopharmaceuticals, Inc | 1 | $124 |
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.
- ONIVYDE$124
How this compares
$124 in reported general payments places this provider in the 10th percentile of 787 gastroenterology providers in Illinois.
Other gastroenterology in Burr Ridge
- Nancy ReauBurr Ridge$357K
- Sujit JanardhanBurr Ridge$166K
- Irving WaxmanBurr Ridge$157K
- 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
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.