| ICD-10 Code | Description |
| T40.601A | Poisoning by unspecified narcotics, accidental (unintentional), initial encounter |
| T40.601D | Poisoning by unspecified narcotics, accidental (unintentional), subsequent encounter |
| T40.601S | Poisoning by unspecified narcotics, accidental (unintentional), sequela |
| T40.602A | Poisoning by unspecified narcotics, intentional self-harm, initial encounter |
| T40.602D | Poisoning by unspecified narcotics, intentional self-harm, subsequent encounter |
| T40.602S | Poisoning by unspecified narcotics, intentional self-harm, sequela |
| T40.603A | Poisoning by unspecified narcotics, assault, initial encounter |
| T40.603D | Poisoning by unspecified narcotics, assault, subsequent encounter |
| T40.603S | Poisoning by unspecified narcotics, assault, sequela |
| T40.604A | Poisoning by unspecified narcotics, undetermined, initial encounter |
| T40.604D | Poisoning by unspecified narcotics, undetermined, subsequent encounter |
| T40.604S | Poisoning by unspecified narcotics, undetermined, sequela |
| T40.605A | Adverse effect of unspecified narcotics, initial encounter |
| T40.605D | Adverse effect of unspecified narcotics, subsequent encounter |
| T40.605S | Adverse effect of unspecified narcotics, sequela |
| T40.606A | Underdosing of unspecified narcotics, initial encounter |
| T40.606D | Underdosing of unspecified narcotics, subsequent encounter |
| T40.606S | Underdosing of unspecified narcotics, sequela |
