Surgeon profile
Gene Chang, M.D.
Gastroenterology · Munster, IN 46321NPI 1033240411
Database refreshed July 2026Live NPPES registry· Industry payments CY2025ⓘ sources
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Tracked procedure volumes
Latest federal claims release with year-over-year momentum. Eight device-heavy specialties tracked — more coming.
730 Medicare cases/yr
708 patients
3 procedures
| Procedure | Cases | Trend | Patients |
|---|---|---|---|
| Colonoscopy with Polypectomy (Snare) CPT 45385 | 332 | ▼ -17% | 329 |
| Upper GI Endoscopy (EGD) with Biopsy CPT 43239 | 280 | ▼ -7% | 262 |
| Colonoscopy with Biopsy CPT 45380 | 118 | ▼ -14% | 117 |
Industry relationships
CMS Open Payments, CY2025 general payments (published June 2026) — who already pays this surgeon.
Pulling CY2025 industry payments + 7-year history…