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T40 Narcotics and psychodysleptics

ICD-10-CM category T40 sits in Chapter 20 (External causes of morbidity, V00-Y99). It contains 258 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

T40.0 Poisoning by, adverse effect of and underdosing of opiumT40.0X Poisoning by, adverse effect of and underdosing of opiumT40.0X1 Poisoning by opium, accidental (unintentional)T40.0X2 Poisoning by opium, intentional self-harmT40.0X3 Poisoning by opium, assaultT40.0X4 Poisoning by opium, undeterminedT40.0X5 Adverse effect of opiumT40.0X6 Underdosing of opiumT40.1 Poisoning by and adverse effect of heroinT40.1X Poisoning by and adverse effect of heroinT40.1X1 Poisoning by heroin, accidental (unintentional)T40.1X2 Poisoning by heroin, intentional self-harmT40.1X3 Poisoning by heroin, assaultT40.1X4 Poisoning by heroin, undeterminedT40.2 Poisoning by, adverse effect of and underdosing of opioidsT40.2X Poisoning by, adverse effect of and underdosing of opioidsT40.2X1 Poisoning by other opioids, accidental (unintentional)T40.2X2 Poisoning by other opioids, intentional self-harmT40.2X3 Poisoning by other opioids, assaultT40.2X4 Poisoning by other opioids, undeterminedT40.2X5 Adverse effect of other opioidsT40.2X6 Underdosing of other opioidsT40.3 Poisoning by, adverse effect of and underdosing of methadoneT40.3X Poisoning by, adverse effect of and underdosing of methadoneT40.3X1 Poisoning by methadone, accidental (unintentional)T40.3X2 Poisoning by methadone, intentional self-harmT40.3X3 Poisoning by methadone, assaultT40.3X4 Poisoning by methadone, undeterminedT40.3X5 Adverse effect of methadoneT40.3X6 Underdosing of methadoneT40.4 Synthetic narcoticsT40.41 Fentanyl or fentanyl analogsT40.411 Poisoning by fentanyl or fentanyl analogs, accidentalT40.412 Poisoning by fentanyl or fentanyl analogs, self-harmT40.413 Poisoning by fentanyl or fentanyl analogs, assaultT40.414 Poisoning by fentanyl or fentanyl analogs, undeterminedT40.415 Adverse effect of fentanyl or fentanyl analogsT40.416 Underdosing of fentanyl or fentanyl analogsT40.42 Poisoning by, adverse effect of and underdosing of tramadolT40.421 Poisoning by tramadol, accidental (unintentional)

Billable codes in T40

CodeDescription
T40.0X1APoisoning by opium, accidental (unintentional), initial encounter
T40.0X1DPoisoning by opium, accidental (unintentional), subsequent encounter
T40.0X1SPoisoning by opium, accidental (unintentional), sequela
T40.0X2APoisoning by opium, intentional self-harm, initial encounter
T40.0X2DPoisoning by opium, intentional self-harm, subsequent encounter
T40.0X2SPoisoning by opium, intentional self-harm, sequela
T40.0X3APoisoning by opium, assault, initial encounter
T40.0X3DPoisoning by opium, assault, subsequent encounter
T40.0X3SPoisoning by opium, assault, sequela
T40.0X4APoisoning by opium, undetermined, initial encounter
T40.0X4DPoisoning by opium, undetermined, subsequent encounter
T40.0X4SPoisoning by opium, undetermined, sequela
T40.0X5AAdverse effect of opium, initial encounter
T40.0X5DAdverse effect of opium, subsequent encounter
T40.0X5SAdverse effect of opium, sequela
T40.0X6AUnderdosing of opium, initial encounter
T40.0X6DUnderdosing of opium, subsequent encounter
T40.0X6SUnderdosing of opium, sequela
T40.1X1APoisoning by heroin, accidental (unintentional), initial encounter
T40.1X1DPoisoning by heroin, accidental (unintentional), subsequent encounter
T40.1X1SPoisoning by heroin, accidental (unintentional), sequela
T40.1X2APoisoning by heroin, intentional self-harm, initial encounter
T40.1X2DPoisoning by heroin, intentional self-harm, subsequent encounter
T40.1X2SPoisoning by heroin, intentional self-harm, sequela
T40.1X3APoisoning by heroin, assault, initial encounter
T40.1X3DPoisoning by heroin, assault, subsequent encounter
T40.1X3SPoisoning by heroin, assault, sequela
T40.1X4APoisoning by heroin, undetermined, initial encounter
T40.1X4DPoisoning by heroin, undetermined, subsequent encounter
T40.1X4SPoisoning by heroin, undetermined, sequela
T40.2X1APoisoning by other opioids, accidental (unintentional), initial encounter
T40.2X1DPoisoning by other opioids, accidental (unintentional), subsequent encounter
T40.2X1SPoisoning by other opioids, accidental (unintentional), sequela
T40.2X2APoisoning by other opioids, intentional self-harm, initial encounter
T40.2X2DPoisoning by other opioids, intentional self-harm, subsequent encounter
T40.2X2SPoisoning by other opioids, intentional self-harm, sequela
T40.2X3APoisoning by other opioids, assault, initial encounter
T40.2X3DPoisoning by other opioids, assault, subsequent encounter
T40.2X3SPoisoning by other opioids, assault, sequela
T40.2X4APoisoning by other opioids, undetermined, initial encounter
T40.2X4DPoisoning by other opioids, undetermined, subsequent encounter
T40.2X4SPoisoning by other opioids, undetermined, sequela
T40.2X5AAdverse effect of other opioids, initial encounter
T40.2X5DAdverse effect of other opioids, subsequent encounter
T40.2X5SAdverse effect of other opioids, sequela
T40.2X6AUnderdosing of other opioids, initial encounter
T40.2X6DUnderdosing of other opioids, subsequent encounter
T40.2X6SUnderdosing of other opioids, sequela
T40.3X1APoisoning by methadone, accidental (unintentional), initial encounter
T40.3X1DPoisoning by methadone, accidental (unintentional), subsequent encounter
T40.3X1SPoisoning by methadone, accidental (unintentional), sequela
T40.3X2APoisoning by methadone, intentional self-harm, initial encounter
T40.3X2DPoisoning by methadone, intentional self-harm, subsequent encounter
T40.3X2SPoisoning by methadone, intentional self-harm, sequela
T40.3X3APoisoning by methadone, assault, initial encounter
T40.3X3DPoisoning by methadone, assault, subsequent encounter
T40.3X3SPoisoning by methadone, assault, sequela
T40.3X4APoisoning by methadone, undetermined, initial encounter
T40.3X4DPoisoning by methadone, undetermined, subsequent encounter
T40.3X4SPoisoning by methadone, undetermined, sequela
T40.3X5AAdverse effect of methadone, initial encounter
T40.3X5DAdverse effect of methadone, subsequent encounter
T40.3X5SAdverse effect of methadone, sequela
T40.3X6AUnderdosing of methadone, initial encounter
T40.3X6DUnderdosing of methadone, subsequent encounter
T40.3X6SUnderdosing of methadone, sequela
T40.411APoisoning by fentanyl or fentanyl analogs, accidental (unintentional), initial encounter
T40.411DPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), subsequent encounter
T40.411SPoisoning by fentanyl or fentanyl analogs, accidental (unintentional), sequela
T40.412APoisoning by fentanyl or fentanyl analogs, intentional self-harm, initial encounter
T40.412DPoisoning by fentanyl or fentanyl analogs, intentional self-harm, subsequent encounter
T40.412SPoisoning by fentanyl or fentanyl analogs, intentional self-harm, sequela
T40.413APoisoning by fentanyl or fentanyl analogs, assault, initial encounter
T40.413DPoisoning by fentanyl or fentanyl analogs, assault, subsequent encounter
T40.413SPoisoning by fentanyl or fentanyl analogs, assault, sequela
T40.414APoisoning by fentanyl or fentanyl analogs, undetermined, initial encounter
T40.414DPoisoning by fentanyl or fentanyl analogs, undetermined, subsequent encounter
T40.414SPoisoning by fentanyl or fentanyl analogs, undetermined, sequela
T40.415AAdverse effect of fentanyl or fentanyl analogs, initial encounter
T40.415DAdverse effect of fentanyl or fentanyl analogs, subsequent encounter
T40.415SAdverse effect of fentanyl or fentanyl analogs, sequela
T40.416AUnderdosing of fentanyl or fentanyl analogs, initial encounter
T40.416DUnderdosing of fentanyl or fentanyl analogs, subsequent encounter
T40.416SUnderdosing of fentanyl or fentanyl analogs, sequela
T40.421APoisoning by tramadol, accidental (unintentional), initial encounter
T40.421DPoisoning by tramadol, accidental (unintentional), subsequent encounter
T40.421SPoisoning by tramadol, accidental (unintentional), sequela
T40.422APoisoning by tramadol, intentional self-harm, initial encounter
T40.422DPoisoning by tramadol, intentional self-harm, subsequent encounter
T40.422SPoisoning by tramadol, intentional self-harm, sequela
T40.423APoisoning by tramadol, assault, initial encounter
T40.423DPoisoning by tramadol, assault, subsequent encounter
T40.423SPoisoning by tramadol, assault, sequela
T40.424APoisoning by tramadol, undetermined, initial encounter
T40.424DPoisoning by tramadol, undetermined, subsequent encounter
T40.424SPoisoning by tramadol, undetermined, sequela
T40.425AAdverse effect of tramadol, initial encounter
T40.425DAdverse effect of tramadol, subsequent encounter
T40.425SAdverse effect of tramadol, sequela
T40.426AUnderdosing of tramadol, initial encounter
T40.426DUnderdosing of tramadol, subsequent encounter
T40.426SUnderdosing of tramadol, sequela
T40.491APoisoning by other synthetic narcotics, accidental (unintentional), initial encounter
T40.491DPoisoning by other synthetic narcotics, accidental (unintentional), subsequent encounter
T40.491SPoisoning by other synthetic narcotics, accidental (unintentional), sequela
T40.492APoisoning by other synthetic narcotics, intentional self-harm, initial encounter
T40.492DPoisoning by other synthetic narcotics, intentional self-harm, subsequent encounter
T40.492SPoisoning by other synthetic narcotics, intentional self-harm, sequela
T40.493APoisoning by other synthetic narcotics, assault, initial encounter
T40.493DPoisoning by other synthetic narcotics, assault, subsequent encounter
T40.493SPoisoning by other synthetic narcotics, assault, sequela
T40.494APoisoning by other synthetic narcotics, undetermined, initial encounter
T40.494DPoisoning by other synthetic narcotics, undetermined, subsequent encounter
T40.494SPoisoning by other synthetic narcotics, undetermined, sequela
T40.495AAdverse effect of other synthetic narcotics, initial encounter
T40.495DAdverse effect of other synthetic narcotics, subsequent encounter
T40.495SAdverse effect of other synthetic narcotics, sequela
T40.496AUnderdosing of other synthetic narcotics, initial encounter
T40.496DUnderdosing of other synthetic narcotics, subsequent encounter
T40.496SUnderdosing of other synthetic narcotics, sequela
T40.5X1APoisoning by cocaine, accidental (unintentional), initial encounter
T40.5X1DPoisoning by cocaine, accidental (unintentional), subsequent encounter
T40.5X1SPoisoning by cocaine, accidental (unintentional), sequela
T40.5X2APoisoning by cocaine, intentional self-harm, initial encounter
T40.5X2DPoisoning by cocaine, intentional self-harm, subsequent encounter
T40.5X2SPoisoning by cocaine, intentional self-harm, sequela
T40.5X3APoisoning by cocaine, assault, initial encounter
T40.5X3DPoisoning by cocaine, assault, subsequent encounter
T40.5X3SPoisoning by cocaine, assault, sequela
T40.5X4APoisoning by cocaine, undetermined, initial encounter
T40.5X4DPoisoning by cocaine, undetermined, subsequent encounter
T40.5X4SPoisoning by cocaine, undetermined, sequela
T40.5X5AAdverse effect of cocaine, initial encounter
T40.5X5DAdverse effect of cocaine, subsequent encounter
T40.5X5SAdverse effect of cocaine, sequela
T40.5X6AUnderdosing of cocaine, initial encounter
T40.5X6DUnderdosing of cocaine, subsequent encounter
T40.5X6SUnderdosing of cocaine, sequela
T40.601APoisoning by unspecified narcotics, accidental (unintentional), initial encounter
T40.601DPoisoning by unspecified narcotics, accidental (unintentional), subsequent encounter
T40.601SPoisoning by unspecified narcotics, accidental (unintentional), sequela
T40.602APoisoning by unspecified narcotics, intentional self-harm, initial encounter
T40.602DPoisoning by unspecified narcotics, intentional self-harm, subsequent encounter
T40.602SPoisoning by unspecified narcotics, intentional self-harm, sequela
T40.603APoisoning by unspecified narcotics, assault, initial encounter
T40.603DPoisoning by unspecified narcotics, assault, subsequent encounter
T40.603SPoisoning by unspecified narcotics, assault, sequela
T40.604APoisoning by unspecified narcotics, undetermined, initial encounter
T40.604DPoisoning by unspecified narcotics, undetermined, subsequent encounter
T40.604SPoisoning by unspecified narcotics, undetermined, sequela
T40.605AAdverse effect of unspecified narcotics, initial encounter
T40.605DAdverse effect of unspecified narcotics, subsequent encounter
T40.605SAdverse effect of unspecified narcotics, sequela
T40.606AUnderdosing of unspecified narcotics, initial encounter
T40.606DUnderdosing of unspecified narcotics, subsequent encounter
T40.606SUnderdosing of unspecified narcotics, sequela
T40.691APoisoning by other narcotics, accidental (unintentional), initial encounter
T40.691DPoisoning by other narcotics, accidental (unintentional), subsequent encounter
T40.691SPoisoning by other narcotics, accidental (unintentional), sequela
T40.692APoisoning by other narcotics, intentional self-harm, initial encounter
T40.692DPoisoning by other narcotics, intentional self-harm, subsequent encounter
T40.692SPoisoning by other narcotics, intentional self-harm, sequela
T40.693APoisoning by other narcotics, assault, initial encounter
T40.693DPoisoning by other narcotics, assault, subsequent encounter
T40.693SPoisoning by other narcotics, assault, sequela
T40.694APoisoning by other narcotics, undetermined, initial encounter
T40.694DPoisoning by other narcotics, undetermined, subsequent encounter
T40.694SPoisoning by other narcotics, undetermined, sequela
T40.695AAdverse effect of other narcotics, initial encounter
T40.695DAdverse effect of other narcotics, subsequent encounter
T40.695SAdverse effect of other narcotics, sequela
T40.696AUnderdosing of other narcotics, initial encounter
T40.696DUnderdosing of other narcotics, subsequent encounter
T40.696SUnderdosing of other narcotics, sequela
T40.711APoisoning by cannabis, accidental (unintentional), initial encounter
T40.711DPoisoning by cannabis, accidental (unintentional), subsequent encounter
T40.711SPoisoning by cannabis, accidental (unintentional), sequela
T40.712APoisoning by cannabis, intentional self-harm, initial encounter
T40.712DPoisoning by cannabis, intentional self-harm, subsequent encounter
T40.712SPoisoning by cannabis, intentional self-harm, sequela
T40.713APoisoning by cannabis, assault, initial encounter
T40.713DPoisoning by cannabis, assault, subsequent encounter
T40.713SPoisoning by cannabis, assault, sequela
T40.714APoisoning by cannabis, undetermined, initial encounter
T40.714DPoisoning by cannabis, undetermined, subsequent encounter
T40.714SPoisoning by cannabis, undetermined, sequela
T40.715AAdverse effect of cannabis, initial encounter
T40.715DAdverse effect of cannabis, subsequent encounter
T40.715SAdverse effect of cannabis, sequela
T40.716AUnderdosing of cannabis, initial encounter
T40.716DUnderdosing of cannabis, subsequent encounter
T40.716SUnderdosing of cannabis, sequela
T40.721APoisoning by synthetic cannabinoids, accidental (unintentional), initial encounter
T40.721DPoisoning by synthetic cannabinoids, accidental (unintentional), subsequent encounter
T40.721SPoisoning by synthetic cannabinoids, accidental (unintentional), sequela
T40.722APoisoning by synthetic cannabinoids, intentional self-harm, initial encounter
T40.722DPoisoning by synthetic cannabinoids, intentional self-harm, subsequent encounter
T40.722SPoisoning by synthetic cannabinoids, intentional self-harm, sequela
T40.723APoisoning by synthetic cannabinoids, assault, initial encounter
T40.723DPoisoning by synthetic cannabinoids, assault, subsequent encounter
T40.723SPoisoning by synthetic cannabinoids, assault, sequela
T40.724APoisoning by synthetic cannabinoids, undetermined, initial encounter
T40.724DPoisoning by synthetic cannabinoids, undetermined, subsequent encounter
T40.724SPoisoning by synthetic cannabinoids, undetermined, sequela
T40.725AAdverse effect of synthetic cannabinoids, initial encounter
T40.725DAdverse effect of synthetic cannabinoids, subsequent encounter
T40.725SAdverse effect of synthetic cannabinoids, sequela
T40.726AUnderdosing of synthetic cannabinoids, initial encounter
T40.726DUnderdosing of synthetic cannabinoids, subsequent encounter
T40.726SUnderdosing of synthetic cannabinoids, sequela
T40.8X1APoisoning by lysergide [LSD], accidental (unintentional), initial encounter
T40.8X1DPoisoning by lysergide [LSD], accidental (unintentional), subsequent encounter
T40.8X1SPoisoning by lysergide [LSD], accidental (unintentional), sequela
T40.8X2APoisoning by lysergide [LSD], intentional self-harm, initial encounter
T40.8X2DPoisoning by lysergide [LSD], intentional self-harm, subsequent encounter
T40.8X2SPoisoning by lysergide [LSD], intentional self-harm, sequela
T40.8X3APoisoning by lysergide [LSD], assault, initial encounter
T40.8X3DPoisoning by lysergide [LSD], assault, subsequent encounter
T40.8X3SPoisoning by lysergide [LSD], assault, sequela
T40.8X4APoisoning by lysergide [LSD], undetermined, initial encounter
T40.8X4DPoisoning by lysergide [LSD], undetermined, subsequent encounter
T40.8X4SPoisoning by lysergide [LSD], undetermined, sequela
T40.901APoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), initial encounter
T40.901DPoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), subsequent encounter
T40.901SPoisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional), sequela
T40.902APoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, initial encounter
T40.902DPoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, subsequent encounter
T40.902SPoisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm, sequela
T40.903APoisoning by unspecified psychodysleptics [hallucinogens], assault, initial encounter
T40.903DPoisoning by unspecified psychodysleptics [hallucinogens], assault, subsequent encounter
T40.903SPoisoning by unspecified psychodysleptics [hallucinogens], assault, sequela
T40.904APoisoning by unspecified psychodysleptics [hallucinogens], undetermined, initial encounter
T40.904DPoisoning by unspecified psychodysleptics [hallucinogens], undetermined, subsequent encounter
T40.904SPoisoning by unspecified psychodysleptics [hallucinogens], undetermined, sequela
T40.905AAdverse effect of unspecified psychodysleptics [hallucinogens], initial encounter
T40.905DAdverse effect of unspecified psychodysleptics [hallucinogens], subsequent encounter
T40.905SAdverse effect of unspecified psychodysleptics [hallucinogens], sequela
T40.906AUnderdosing of unspecified psychodysleptics [hallucinogens], initial encounter
T40.906DUnderdosing of unspecified psychodysleptics [hallucinogens], subsequent encounter
T40.906SUnderdosing of unspecified psychodysleptics [hallucinogens], sequela
T40.991APoisoning by other psychodysleptics [hallucinogens], accidental (unintentional), initial encounter
T40.991DPoisoning by other psychodysleptics [hallucinogens], accidental (unintentional), subsequent encounter
T40.991SPoisoning by other psychodysleptics [hallucinogens], accidental (unintentional), sequela
T40.992APoisoning by other psychodysleptics [hallucinogens], intentional self-harm, initial encounter
T40.992DPoisoning by other psychodysleptics [hallucinogens], intentional self-harm, subsequent encounter
T40.992SPoisoning by other psychodysleptics [hallucinogens], intentional self-harm, sequela
T40.993APoisoning by other psychodysleptics [hallucinogens], assault, initial encounter
T40.993DPoisoning by other psychodysleptics [hallucinogens], assault, subsequent encounter
T40.993SPoisoning by other psychodysleptics [hallucinogens], assault, sequela
T40.994APoisoning by other psychodysleptics [hallucinogens], undetermined, initial encounter
T40.994DPoisoning by other psychodysleptics [hallucinogens], undetermined, subsequent encounter
T40.994SPoisoning by other psychodysleptics [hallucinogens], undetermined, sequela
T40.995AAdverse effect of other psychodysleptics [hallucinogens], initial encounter
T40.995DAdverse effect of other psychodysleptics [hallucinogens], subsequent encounter
T40.995SAdverse effect of other psychodysleptics [hallucinogens], sequela
T40.996AUnderdosing of other psychodysleptics [hallucinogens], initial encounter
T40.996DUnderdosing of other psychodysleptics [hallucinogens], subsequent encounter
T40.996SUnderdosing of other psychodysleptics [hallucinogens], sequela

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