| Billable | No — use a more specific child code |
| Chapter | Chapter 19: Injury, poisoning and certain other consequences of external causes (S00-T88) |
| Section | Other and unspecified effects of external causes (T66-T78) |
| Parent code | T71.22 — Asphyxiation due to being trapped in a car trunk |
| Requires 7th character | Yes |