Surgeon profile
Mark Chang, M.D.
Orthopedic Surgery · Dyer, IN 46311NPI 1871607507
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. Orthopedics & cardiology tracked — more specialties coming.
86 Medicare cases/yr
80 patients
3 procedures
| Procedure | Cases | Trend | Patients |
|---|---|---|---|
| Lumbar Laminectomy CPT 63047 | 49 | ▼ -8% | 45 |
| Lumbar Fusion — Posterior CPT 22612 | 22 | ▲ +47% | 20 |
| Lumbar Fusion — Combined (TLIF/PLIF) CPT 22633 | 15 | ▼ -29% | 15 |
Industry relationships
CMS Open Payments, CY2025 general payments (published June 2026) — who already pays this surgeon.
Pulling CY2025 industry payments + 7-year history…