Surgeon profile
David Chang, M.D.
Ophthalmology · Los Altos, CA 94024NPI 1316966138
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.
1,155 Medicare cases/yr
784 patients
4 procedures
| Procedure | Cases | Trend | Patients |
|---|---|---|---|
| Cataract Surgery with IOL CPT 66984 | 940 | ≈ flat | 605 |
| Complex Cataract Surgery CPT 66982 | 103 | ▼ -8% | 76 |
| YAG Laser Capsulotomy CPT 66821 | 99 | ▼ -8% | 92 |
| Cataract Surgery with MIGS Stent CPT 66991 | 13 | ▼ -24% | 11 |
Industry relationships
CMS Open Payments, CY2025 general payments (published June 2026) — who already pays this surgeon.
Pulling CY2025 industry payments + 7-year history…