| T40.0X | Poisoning by, adverse effect of and underdosing of opium | NON-BILLABLE CODE |
| T40.0X1 | Poisoning by opium, accidental (unintentional) | NON-BILLABLE CODE |
| T40.0X1A | Poisoning by opium, accidental (unintentional), initial encounter | BILLABLE CODE |
| T40.0X1D | Poisoning by opium, accidental (unintentional), subsequent encounter | BILLABLE CODE |
| T40.0X1S | Poisoning by opium, accidental (unintentional), sequela | BILLABLE CODE |
| T40.0X2 | Poisoning by opium, intentional self-harm | NON-BILLABLE CODE |
| T40.0X2A | Poisoning by opium, intentional self-harm, initial encounter | BILLABLE CODE |
| T40.0X2D | Poisoning by opium, intentional self-harm, subsequent encounter | BILLABLE CODE |
| T40.0X2S | Poisoning by opium, intentional self-harm, sequela | BILLABLE CODE |
| T40.0X3 | Poisoning by opium, assault | NON-BILLABLE CODE |
| T40.0X3A | Poisoning by opium, assault, initial encounter | BILLABLE CODE |
| T40.0X3D | Poisoning by opium, assault, subsequent encounter | BILLABLE CODE |
| T40.0X3S | Poisoning by opium, assault, sequela | BILLABLE CODE |
| T40.0X4 | Poisoning by opium, undetermined | NON-BILLABLE CODE |
| T40.0X4A | Poisoning by opium, undetermined, initial encounter | BILLABLE CODE |
| T40.0X4D | Poisoning by opium, undetermined, subsequent encounter | BILLABLE CODE |
| T40.0X4S | Poisoning by opium, undetermined, sequela | BILLABLE CODE |
| T40.0X5 | Adverse effect of opium | NON-BILLABLE CODE |
| T40.0X5A | Adverse effect of opium, initial encounter | BILLABLE CODE |
| T40.0X5D | Adverse effect of opium, subsequent encounter | BILLABLE CODE |
| T40.0X5S | Adverse effect of opium, sequela | BILLABLE CODE |
| T40.0X6 | Underdosing of opium | NON-BILLABLE CODE |
| T40.0X6A | Underdosing of opium, initial encounter | BILLABLE CODE |
| T40.0X6D | Underdosing of opium, subsequent encounter | BILLABLE CODE |
| T40.0X6S | Underdosing of opium, sequela | BILLABLE CODE |
