| T59.4X1 | Toxic effect of chlorine gas, accidental (unintentional) | NON-BILLABLE CODE |
| T59.4X1A | Toxic effect of chlorine gas, accidental (unintentional), initial encounter | BILLABLE CODE |
| T59.4X1D | Toxic effect of chlorine gas, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T59.4X1S | Toxic effect of chlorine gas, accidental (unintentional), sequela | BILLABLE CODE |
| T59.4X2 | Toxic effect of chlorine gas, intentional self-harm | NON-BILLABLE CODE |
| T59.4X2A | Toxic effect of chlorine gas, intentional self-harm, initial encounter | BILLABLE CODE |
| T59.4X2D | Toxic effect of chlorine gas, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T59.4X2S | Toxic effect of chlorine gas, intentional self-harm, sequela | BILLABLE CODE |
| T59.4X3 | Toxic effect of chlorine gas, assault | NON-BILLABLE CODE |
| T59.4X3A | Toxic effect of chlorine gas, assault, initial encounter | BILLABLE CODE |
| T59.4X3D | Toxic effect of chlorine gas, assault, subsequent encounter | BILLABLE CODE |
| T59.4X3S | Toxic effect of chlorine gas, assault, sequela | BILLABLE CODE |
| T59.4X4 | Toxic effect of chlorine gas, undetermined | NON-BILLABLE CODE |
| T59.4X4A | Toxic effect of chlorine gas, undetermined, initial encounter | BILLABLE CODE |
| T59.4X4D | Toxic effect of chlorine gas, undetermined, subsequent encounter | BILLABLE CODE |
| T59.4X4S | Toxic effect of chlorine gas, undetermined, sequela | BILLABLE CODE |
