| T58.91 | Toxic effect of carbon monoxide from unspecified source, accidental (unintentional) | NON-BILLABLE CODE |
| T58.91XA | Toxic effect of carbon monoxide from unspecified source, accidental (unintentional), initial encounter | BILLABLE CODE |
| T58.91XD | Toxic effect of carbon monoxide from unspecified source, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T58.91XS | Toxic effect of carbon monoxide from unspecified source, accidental (unintentional), sequela | BILLABLE CODE |
| T58.92 | Toxic effect of carbon monoxide from unspecified source, intentional self-harm | NON-BILLABLE CODE |
| T58.92XA | Toxic effect of carbon monoxide from unspecified source, intentional self-harm, initial encounter | BILLABLE CODE |
| T58.92XD | Toxic effect of carbon monoxide from unspecified source, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T58.92XS | Toxic effect of carbon monoxide from unspecified source, intentional self-harm, sequela | BILLABLE CODE |
| T58.93 | Toxic effect of carbon monoxide from unspecified source, assault | NON-BILLABLE CODE |
| T58.93XA | Toxic effect of carbon monoxide from unspecified source, assault, initial encounter | BILLABLE CODE |
| T58.93XD | Toxic effect of carbon monoxide from unspecified source, assault, subsequent encounter | BILLABLE CODE |
| T58.93XS | Toxic effect of carbon monoxide from unspecified source, assault, sequela | BILLABLE CODE |
| T58.94 | Toxic effect of carbon monoxide from unspecified source, undetermined | NON-BILLABLE CODE |
| T58.94XA | Toxic effect of carbon monoxide from unspecified source, undetermined, initial encounter | BILLABLE CODE |
| T58.94XD | Toxic effect of carbon monoxide from unspecified source, undetermined, subsequent encounter | BILLABLE CODE |
| T58.94XS | Toxic effect of carbon monoxide from unspecified source, undetermined, sequela | BILLABLE CODE |
