Ilwoong Chang
Gastroenterology · Munster, INNPI 1578524831
Payments from drug & device makers
Across 153 payments — averaging $12.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$431
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$375
- Nestle Healthcare Nutrition Inc.$245
- Ambu Inc.$197
- Takeda Pharmaceuticals U.S.A., Inc.$149
- Braintree Laboratories, Inc.$136
- plus $390 from 8 others
What the payments were for
- Food & beverage$1,84796%
- Gifts$764%
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(2 entities) | 57 | $431 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 23 | $375 |
| Nestle Healthcare Nutrition Inc. | 25 | $245 |
| Ambu Inc. | 2 | $197 |
| Takeda Pharmaceuticals U.S.A., Inc. | 10 | $149 |
| Braintree Laboratories, Inc. | 9 | $136 |
| Ironwood Pharmaceuticals, Inc | 8 | $120 |
| Johnson & Johnson | 4 | $62 |
| Gilead | 3 | $55 |
| Romark Laboratories, LC | 5 | $43 |
| Merck | 3 | $42 |
| Intercept Pharmaceuticals, Inc. | 2 | $29 |
| Redhill Biopharma Inc. | 1 | $23 |
| Vivus LLC | 1 | $16 |
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.
- XIFAXAN$100
How this compares
$1,923 in reported general payments places this provider in the 45th percentile of 323 gastroenterology providers in Indiana.
Other gastroenterology in Munster
- Anoop AppannagariMunster$120K
- Priti NuthakkiMunster$17K
- Gene ChangMunster$14K
- Michelle SrisuwananukornMunster$13K
- Navin KumarMunster$12K
- Monika FischerIndianapolis$2.8M
- Douglas RexIndianapolis$2.3M
- Pankaj PatelSouth Bend$2.3M
- David PoundIndianapolis$1.4M
- Naga ChalasaniIndianapolis$1.1M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.