Gene Chang, MD
Gastroenterology · Munster, INNPI 1033240411
Payments from drug & device makers
Across 571 payments — averaging $24.31 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Braintree Laboratories, Inc.$4K
- AbbVie$1K
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$1K
- Nestle Healthcare Nutrition Inc.$1K
- Boston Scientific$1K
- Johnson & Johnson$728
- plus $4K from 22 others
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 |
|---|---|---|
| Braintree Laboratories, Inc. | 38 | $3,550 |
| AbbVie(2 entities) | 141 | $1,465 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 116 | $1,463 |
| Nestle Healthcare Nutrition Inc. | 83 | $1,242 |
| Boston Scientific | 13 | $1,214 |
| Johnson & Johnson(3 entities) | 27 | $728 |
| Bristol Myers Squibb | 46 | $530 |
| Janssen Scientific Affairs, LLC | 4 | $464 |
| E.r. Squibb & Sons, L.L.C. | 4 | $350 |
| Takeda Pharmaceuticals U.S.A., Inc. | 28 | $339 |
| Olympus America Inc. | 3 | $321 |
| Sanofi | 7 | $276 |
| Medtronic | 2 | $207 |
| Steris Corporation | 2 | $204 |
| Ambu Inc. | 3 | $200 |
| Ironwood Pharmaceuticals, Inc | 11 | $165 |
| Gilead | 10 | $157 |
| Romark Laboratories, LC | 4 | $151 |
| Ardelyx, Inc. | 3 | $138 |
| Pfizer | 9 | $136 |
| Sanofi-aventis U.S. LLC | 1 | $125 |
| Madrigal Pharmaceuticals | 2 | $117 |
| GI Supply, Inc. | 1 | $116 |
| Merck | 5 | $82 |
| QOL Medical, LLC | 3 | $52 |
| UCB, Inc. | 2 | $35 |
| Vivus LLC | 2 | $33 |
| Aimmune Therapeutics, Inc. | 1 | $21 |
How this compares
$13,883 in reported general payments places this provider in the 80th percentile of 323 gastroenterology providers in Indiana.
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.
Other gastroenterology in Munster
- Anoop AppannagariMunster$120K
- Priti NuthakkiMunster$17K
- 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
- Sashidhar SagiWestfield$1.1M
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.