| T71.20 | Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause | NON-BILLABLE CODE |
| T71.20XA | Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause, initial encounter | BILLABLE CODE |
| T71.20XD | Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause, subsequent encounter | BILLABLE CODE |
| T71.20XS | Asphyxiation due to systemic oxygen deficiency due to low oxygen content in ambient air due to unspecified cause, sequela | BILLABLE CODE |
| T71.21 | Asphyxiation due to cave-in or falling earth | NON-BILLABLE CODE |
| T71.21XA | Asphyxiation due to cave-in or falling earth, initial encounter | BILLABLE CODE |
| T71.21XD | Asphyxiation due to cave-in or falling earth, subsequent encounter | BILLABLE CODE |
| T71.21XS | Asphyxiation due to cave-in or falling earth, sequela | BILLABLE CODE |
| T71.22 | Asphyxiation due to being trapped in a car trunk | NON-BILLABLE CODE |
| T71.221 | Asphyxiation due to being trapped in a car trunk, accidental | NON-BILLABLE CODE |
| T71.221A | Asphyxiation due to being trapped in a car trunk, accidental, initial encounter | BILLABLE CODE |
| T71.221D | Asphyxiation due to being trapped in a car trunk, accidental, subsequent encounter | BILLABLE CODE |
| T71.221S | Asphyxiation due to being trapped in a car trunk, accidental, sequela | BILLABLE CODE |
| T71.222 | Asphyxiation due to being trapped in a car trunk, intentional self-harm | NON-BILLABLE CODE |
| T71.222A | Asphyxiation due to being trapped in a car trunk, intentional self-harm, initial encounter | BILLABLE CODE |
| T71.222D | Asphyxiation due to being trapped in a car trunk, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T71.222S | Asphyxiation due to being trapped in a car trunk, intentional self-harm, sequela | BILLABLE CODE |
| T71.223 | Asphyxiation due to being trapped in a car trunk, assault | NON-BILLABLE CODE |
| T71.223A | Asphyxiation due to being trapped in a car trunk, assault, initial encounter | BILLABLE CODE |
| T71.223D | Asphyxiation due to being trapped in a car trunk, assault, subsequent encounter | BILLABLE CODE |
| T71.223S | Asphyxiation due to being trapped in a car trunk, assault, sequela | BILLABLE CODE |
| T71.224 | Asphyxiation due to being trapped in a car trunk, undetermined | NON-BILLABLE CODE |
| T71.224A | Asphyxiation due to being trapped in a car trunk, undetermined, initial encounter | BILLABLE CODE |
| T71.224D | Asphyxiation due to being trapped in a car trunk, undetermined, subsequent encounter | BILLABLE CODE |
| T71.224S | Asphyxiation due to being trapped in a car trunk, undetermined, sequela | BILLABLE CODE |
| T71.23 | Asphyxiation due to being trapped in a (discarded) refrigerator | NON-BILLABLE CODE |
| T71.231 | Asphyxiation due to being trapped in a (discarded) refrigerator, accidental | NON-BILLABLE CODE |
| T71.231A | Asphyxiation due to being trapped in a (discarded) refrigerator, accidental, initial encounter | BILLABLE CODE |
| T71.231D | Asphyxiation due to being trapped in a (discarded) refrigerator, accidental, subsequent encounter | BILLABLE CODE |
| T71.231S | Asphyxiation due to being trapped in a (discarded) refrigerator, accidental, sequela | BILLABLE CODE |
| T71.232 | Asphyxiation due to being trapped in a (discarded) refrigerator, intentional self-harm | NON-BILLABLE CODE |
| T71.232A | Asphyxiation due to being trapped in a (discarded) refrigerator, intentional self-harm, initial encounter | BILLABLE CODE |
| T71.232D | Asphyxiation due to being trapped in a (discarded) refrigerator, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T71.232S | Asphyxiation due to being trapped in a (discarded) refrigerator, intentional self-harm, sequela | BILLABLE CODE |
| T71.233 | Asphyxiation due to being trapped in a (discarded) refrigerator, assault | NON-BILLABLE CODE |
| T71.233A | Asphyxiation due to being trapped in a (discarded) refrigerator, assault, initial encounter | BILLABLE CODE |
| T71.233D | Asphyxiation due to being trapped in a (discarded) refrigerator, assault, subsequent encounter | BILLABLE CODE |
| T71.233S | Asphyxiation due to being trapped in a (discarded) refrigerator, assault, sequela | BILLABLE CODE |
| T71.234 | Asphyxiation due to being trapped in a (discarded) refrigerator, undetermined | NON-BILLABLE CODE |
| T71.234A | Asphyxiation due to being trapped in a (discarded) refrigerator, undetermined, initial encounter | BILLABLE CODE |
| T71.234D | Asphyxiation due to being trapped in a (discarded) refrigerator, undetermined, subsequent encounter | BILLABLE CODE |
| T71.234S | Asphyxiation due to being trapped in a (discarded) refrigerator, undetermined, sequela | BILLABLE CODE |
| T71.29 | Asphyxiation due to being trapped in other low oxygen environment | NON-BILLABLE CODE |
| T71.29XA | Asphyxiation due to being trapped in other low oxygen environment, initial encounter | BILLABLE CODE |
| T71.29XD | Asphyxiation due to being trapped in other low oxygen environment, subsequent encounter | BILLABLE CODE |
| T71.29XS | Asphyxiation due to being trapped in other low oxygen environment, sequela | BILLABLE CODE |
