| Full description | Exposure to sudden change in air pressure in aircraft during ascent, subsequent encounter |
| Billable | Yes |
| Chapter | Chapter 20: External causes of morbidity (V00-Y99) |
| Section | Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99) |
| Parent code | W94.23 — Exposure to chng in air pressure in aircraft during ascent |