T40Not billable, use a more specific code below
Poisoning by, adverse effect of and underdosing of narcotics and psychodysleptics [hallucinogens]
In Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50), chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes
258 billable codes under T40: none are a CC or MCC; 41 map to HCC 137 (Drug Use Disorder, Moderate/Severe, or Drug Use with Non-Psychotic Complications), HCC 155 (Major Depression, Moderate or Severe, without Psychosis).An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Also applies, from Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
These notes sit on T36-T50 and apply to every code under it, including T40.
Includes: conditions that are coded here
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Excludes1: not coded here, use a different code
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Excludes2: not included here, code separately if applicable
Code first: code the underlying condition first, then this code
Use additional code: add a second code for this, listed after this one
- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
- Section I.C.19.e Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82), covers T40
For adverse effects, code the effect first, then T36-T50 with character 5. Sequence poisonings (unknown intent coded accidental) and toxic effects (T51-T65) first; underdosing (character 6) is never first-listed.
Other Chapter 19 topics:
- Application of 7th Characters in Chapter 19 (page 77)
- Coding of Injuries (page 78)
- Coding of Traumatic Fractures (page 79)
- Coding of Burns and Corrosions (page 80)
- Adult and child abuse, neglect and other maltreatment (page 85)
- Complications of care (page 85)
All codes under T40
T40 can't be used on a claim. Pick a billable code below; grey headings group them.
- T40.0Poisoning by, adverse effect of and underdosing of opium
- T40.0XPoisoning by, adverse effect of and underdosing of opium
- T40.0X1Poisoning by opium, accidental (unintentional)
- T40.0X1APoisoning by opium, accidental (unintentional), initial encounter
- T40.0X1DPoisoning by opium, accidental (unintentional), subsequent encounter
- T40.0X1SPoisoning by opium, accidental (unintentional), sequela
- T40.0X2Poisoning by opium, intentional self-harm
- 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
- T40.0X3Poisoning by opium, assault
- T40.0X3APoisoning by opium, assault, initial encounter
- T40.0X3DPoisoning by opium, assault, subsequent encounter
- T40.0X3SPoisoning by opium, assault, sequela
- T40.0X4Poisoning by opium, undetermined
- T40.0X4APoisoning by opium, undetermined, initial encounter
- T40.0X4DPoisoning by opium, undetermined, subsequent encounter
- T40.0X4SPoisoning by opium, undetermined, sequela
- T40.0X5Adverse effect of opium
- T40.0X5AAdverse effect of opium, initial encounter
- T40.0X5DAdverse effect of opium, subsequent encounter
- T40.0X5SAdverse effect of opium, sequela
- T40.0X6Underdosing of opium
- T40.0X6AUnderdosing of opium, initial encounter
- T40.0X6DUnderdosing of opium, subsequent encounter
- T40.0X6SUnderdosing of opium, sequela
- T40.1Poisoning by and adverse effect of heroin
- T40.1XPoisoning by and adverse effect of heroin
- T40.1X1Poisoning by heroin, accidental (unintentional)
- T40.1X1APoisoning by heroin, accidental (unintentional), initial encounter
- T40.1X1DPoisoning by heroin, accidental (unintentional), subsequent encounter
- T40.1X1SPoisoning by heroin, accidental (unintentional), sequela
- T40.1X2Poisoning by heroin, intentional self-harm
- 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
- T40.1X3Poisoning by heroin, assault
- T40.1X3APoisoning by heroin, assault, initial encounter
- T40.1X3DPoisoning by heroin, assault, subsequent encounter
- T40.1X3SPoisoning by heroin, assault, sequela
- T40.1X4Poisoning by heroin, undetermined
- T40.1X4APoisoning by heroin, undetermined, initial encounter
- T40.1X4DPoisoning by heroin, undetermined, subsequent encounter
- T40.1X4SPoisoning by heroin, undetermined, sequela
- T40.2Poisoning by, adverse effect of and underdosing of other opioids
- T40.2XPoisoning by, adverse effect of and underdosing of other opioids
- T40.2X1Poisoning by other opioids, accidental (unintentional)
- 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
- T40.2X2Poisoning by other opioids, intentional self-harm
- 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
- T40.2X3Poisoning by other opioids, assault
- T40.2X3APoisoning by other opioids, assault, initial encounter
- T40.2X3DPoisoning by other opioids, assault, subsequent encounter
- T40.2X3SPoisoning by other opioids, assault, sequela
- T40.2X4Poisoning by other opioids, undetermined
- T40.2X4APoisoning by other opioids, undetermined, initial encounter
- T40.2X4DPoisoning by other opioids, undetermined, subsequent encounter
- T40.2X4SPoisoning by other opioids, undetermined, sequela
- T40.2X5Adverse effect of other opioids
- T40.2X5AAdverse effect of other opioids, initial encounter
- T40.2X5DAdverse effect of other opioids, subsequent encounter
- T40.2X5SAdverse effect of other opioids, sequela
- T40.2X6Underdosing of other opioids
- T40.2X6AUnderdosing of other opioids, initial encounter
- T40.2X6DUnderdosing of other opioids, subsequent encounter
- T40.2X6SUnderdosing of other opioids, sequela
- T40.3Poisoning by, adverse effect of and underdosing of methadone
- T40.3XPoisoning by, adverse effect of and underdosing of methadone
- T40.3X1Poisoning by methadone, accidental (unintentional)
- T40.3X1APoisoning by methadone, accidental (unintentional), initial encounter
- T40.3X1DPoisoning by methadone, accidental (unintentional), subsequent encounter
- T40.3X1SPoisoning by methadone, accidental (unintentional), sequela
- T40.3X2Poisoning by methadone, intentional self-harm
- 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
- T40.3X3Poisoning by methadone, assault
- T40.3X3APoisoning by methadone, assault, initial encounter
- T40.3X3DPoisoning by methadone, assault, subsequent encounter
- T40.3X3SPoisoning by methadone, assault, sequela
- T40.3X4Poisoning by methadone, undetermined
- T40.3X4APoisoning by methadone, undetermined, initial encounter
- T40.3X4DPoisoning by methadone, undetermined, subsequent encounter
- T40.3X4SPoisoning by methadone, undetermined, sequela
- T40.3X5Adverse effect of methadone
- T40.3X5AAdverse effect of methadone, initial encounter
- T40.3X5DAdverse effect of methadone, subsequent encounter
- T40.3X5SAdverse effect of methadone, sequela
- T40.3X6Underdosing of methadone
- T40.3X6AUnderdosing of methadone, initial encounter
- T40.3X6DUnderdosing of methadone, subsequent encounter
- T40.3X6SUnderdosing of methadone, sequela
- T40.4Poisoning by, adverse effect of and underdosing of other synthetic narcotics
- T40.41Poisoning by, adverse effect of and underdosing of fentanyl or fentanyl analogs
- T40.411Poisoning by fentanyl or fentanyl analogs, accidental (unintentional)
- 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
- T40.412Poisoning by fentanyl or fentanyl analogs, intentional self-harm
- 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
- T40.413Poisoning by fentanyl or fentanyl analogs, assault
- 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
- T40.414Poisoning by fentanyl or fentanyl analogs, undetermined
- 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
- T40.415Adverse effect of fentanyl or fentanyl analogs
- 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
- T40.416Underdosing of fentanyl or fentanyl analogs
- 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
- T40.42Poisoning by, adverse effect of and underdosing of tramadol
- T40.421Poisoning by tramadol, accidental (unintentional)
- T40.421APoisoning by tramadol, accidental (unintentional), initial encounter
- T40.421DPoisoning by tramadol, accidental (unintentional), subsequent encounter
- T40.421SPoisoning by tramadol, accidental (unintentional), sequela
- T40.422Poisoning by tramadol, intentional self-harm
- 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
- T40.423Poisoning by tramadol, assault
- T40.423APoisoning by tramadol, assault, initial encounter
- T40.423DPoisoning by tramadol, assault, subsequent encounter
- T40.423SPoisoning by tramadol, assault, sequela
- T40.424Poisoning by tramadol, undetermined
- T40.424APoisoning by tramadol, undetermined, initial encounter
- T40.424DPoisoning by tramadol, undetermined, subsequent encounter
- T40.424SPoisoning by tramadol, undetermined, sequela
- T40.425Adverse effect of tramadol
- T40.425AAdverse effect of tramadol, initial encounter
- T40.425DAdverse effect of tramadol, subsequent encounter
- T40.425SAdverse effect of tramadol, sequela
- T40.426Underdosing of tramadol
- T40.426AUnderdosing of tramadol, initial encounter
- T40.426DUnderdosing of tramadol, subsequent encounter
- T40.426SUnderdosing of tramadol, sequela
- T40.49Poisoning by, adverse effect of and underdosing of other synthetic narcotics
- T40.491Poisoning by other synthetic narcotics, accidental (unintentional)
- 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
- T40.492Poisoning by other synthetic narcotics, intentional self-harm
- 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
- T40.493Poisoning by other synthetic narcotics, assault
- 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
- T40.494Poisoning by other synthetic narcotics, undetermined
- 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
- T40.495Adverse effect of other synthetic narcotics
- 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
- T40.496Underdosing of other synthetic narcotics
- T40.496AUnderdosing of other synthetic narcotics, initial encounter
- T40.496DUnderdosing of other synthetic narcotics, subsequent encounter
- T40.496SUnderdosing of other synthetic narcotics, sequela
- T40.5Poisoning by, adverse effect of and underdosing of cocaine
- T40.5XPoisoning by, adverse effect of and underdosing of cocaine
- T40.5X1Poisoning by cocaine, accidental (unintentional)
- T40.5X1APoisoning by cocaine, accidental (unintentional), initial encounter
- T40.5X1DPoisoning by cocaine, accidental (unintentional), subsequent encounter
- T40.5X1SPoisoning by cocaine, accidental (unintentional), sequela
- T40.5X2Poisoning by cocaine, intentional self-harm
- 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
- T40.5X3Poisoning by cocaine, assault
- T40.5X3APoisoning by cocaine, assault, initial encounter
- T40.5X3DPoisoning by cocaine, assault, subsequent encounter
- T40.5X3SPoisoning by cocaine, assault, sequela
- T40.5X4Poisoning by cocaine, undetermined
- T40.5X4APoisoning by cocaine, undetermined, initial encounter
- T40.5X4DPoisoning by cocaine, undetermined, subsequent encounter
- T40.5X4SPoisoning by cocaine, undetermined, sequela
- T40.5X5Adverse effect of cocaine
- T40.5X5AAdverse effect of cocaine, initial encounter
- T40.5X5DAdverse effect of cocaine, subsequent encounter
- T40.5X5SAdverse effect of cocaine, sequela
- T40.5X6Underdosing of cocaine
- T40.5X6AUnderdosing of cocaine, initial encounter
- T40.5X6DUnderdosing of cocaine, subsequent encounter
- T40.5X6SUnderdosing of cocaine, sequela
- T40.6Poisoning by, adverse effect of and underdosing of other and unspecified narcotics
- T40.60Poisoning by, adverse effect of and underdosing of unspecified narcotics
- T40.601Poisoning by unspecified narcotics, accidental (unintentional)
- 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
- T40.602Poisoning by unspecified narcotics, intentional self-harm
- 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
- T40.603Poisoning by unspecified narcotics, assault
- T40.603APoisoning by unspecified narcotics, assault, initial encounter
- T40.603DPoisoning by unspecified narcotics, assault, subsequent encounter
- T40.603SPoisoning by unspecified narcotics, assault, sequela
- T40.604Poisoning by unspecified narcotics, undetermined
- T40.604APoisoning by unspecified narcotics, undetermined, initial encounter
- T40.604DPoisoning by unspecified narcotics, undetermined, subsequent encounter
- T40.604SPoisoning by unspecified narcotics, undetermined, sequela
- T40.605Adverse effect of unspecified narcotics
- T40.605AAdverse effect of unspecified narcotics, initial encounter
- T40.605DAdverse effect of unspecified narcotics, subsequent encounter
- T40.605SAdverse effect of unspecified narcotics, sequela
- T40.606Underdosing of unspecified narcotics
- T40.606AUnderdosing of unspecified narcotics, initial encounter
- T40.606DUnderdosing of unspecified narcotics, subsequent encounter
- T40.606SUnderdosing of unspecified narcotics, sequela
- T40.69Poisoning by, adverse effect of and underdosing of other narcotics
- T40.691Poisoning by other narcotics, accidental (unintentional)
- 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
- T40.692Poisoning by other narcotics, intentional self-harm
- 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
- T40.693Poisoning by other narcotics, assault
- T40.693APoisoning by other narcotics, assault, initial encounter
- T40.693DPoisoning by other narcotics, assault, subsequent encounter
- T40.693SPoisoning by other narcotics, assault, sequela
- T40.694Poisoning by other narcotics, undetermined
- T40.694APoisoning by other narcotics, undetermined, initial encounter
- T40.694DPoisoning by other narcotics, undetermined, subsequent encounter
- T40.694SPoisoning by other narcotics, undetermined, sequela
- T40.695Adverse effect of other narcotics
- T40.695AAdverse effect of other narcotics, initial encounter
- T40.695DAdverse effect of other narcotics, subsequent encounter
- T40.695SAdverse effect of other narcotics, sequela
- T40.696Underdosing of other narcotics
- T40.696AUnderdosing of other narcotics, initial encounter
- T40.696DUnderdosing of other narcotics, subsequent encounter
- T40.696SUnderdosing of other narcotics, sequela
- T40.7Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
- T40.71Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
- T40.711Poisoning by cannabis, accidental (unintentional)
- T40.711APoisoning by cannabis, accidental (unintentional), initial encounter
- T40.711DPoisoning by cannabis, accidental (unintentional), subsequent encounter
- T40.711SPoisoning by cannabis, accidental (unintentional), sequela
- T40.712Poisoning by cannabis, intentional self-harm
- 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
- T40.713Poisoning by cannabis, assault
- T40.713APoisoning by cannabis, assault, initial encounter
- T40.713DPoisoning by cannabis, assault, subsequent encounter
- T40.713SPoisoning by cannabis, assault, sequela
- T40.714Poisoning by cannabis, undetermined
- T40.714APoisoning by cannabis, undetermined, initial encounter
- T40.714DPoisoning by cannabis, undetermined, subsequent encounter
- T40.714SPoisoning by cannabis, undetermined, sequela
- T40.715Adverse effect of cannabis
- T40.715AAdverse effect of cannabis, initial encounter
- T40.715DAdverse effect of cannabis, subsequent encounter
- T40.715SAdverse effect of cannabis, sequela
- T40.716Underdosing of cannabis
- T40.716AUnderdosing of cannabis, initial encounter
- T40.716DUnderdosing of cannabis, subsequent encounter
- T40.716SUnderdosing of cannabis, sequela
- T40.72Poisoning by, adverse effect of and underdosing of synthetic cannabinoids
- T40.721Poisoning by synthetic cannabinoids, accidental (unintentional)
- 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
- T40.722Poisoning by synthetic cannabinoids, intentional self-harm
- 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
- T40.723Poisoning by synthetic cannabinoids, assault
- T40.723APoisoning by synthetic cannabinoids, assault, initial encounter
- T40.723DPoisoning by synthetic cannabinoids, assault, subsequent encounter
- T40.723SPoisoning by synthetic cannabinoids, assault, sequela
- T40.724Poisoning by synthetic cannabinoids, undetermined
- T40.724APoisoning by synthetic cannabinoids, undetermined, initial encounter
- T40.724DPoisoning by synthetic cannabinoids, undetermined, subsequent encounter
- T40.724SPoisoning by synthetic cannabinoids, undetermined, sequela
- T40.725Adverse effect of synthetic cannabinoids
- T40.725AAdverse effect of synthetic cannabinoids, initial encounter
- T40.725DAdverse effect of synthetic cannabinoids, subsequent encounter
- T40.725SAdverse effect of synthetic cannabinoids, sequela
- T40.726Underdosing of synthetic cannabinoids
- T40.726AUnderdosing of synthetic cannabinoids, initial encounter
- T40.726DUnderdosing of synthetic cannabinoids, subsequent encounter
- T40.726SUnderdosing of synthetic cannabinoids, sequela
- T40.8Poisoning by and adverse effect of lysergide [LSD]
- T40.8XPoisoning by and adverse effect of lysergide [LSD]
- T40.8X1Poisoning by lysergide [LSD], accidental (unintentional)
- 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
- T40.8X2Poisoning by lysergide [LSD], intentional self-harm
- 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
- T40.8X3Poisoning by lysergide [LSD], assault
- T40.8X3APoisoning by lysergide [LSD], assault, initial encounter
- T40.8X3DPoisoning by lysergide [LSD], assault, subsequent encounter
- T40.8X3SPoisoning by lysergide [LSD], assault, sequela
- T40.8X4Poisoning by lysergide [LSD], undetermined
- T40.8X4APoisoning by lysergide [LSD], undetermined, initial encounter
- T40.8X4DPoisoning by lysergide [LSD], undetermined, subsequent encounter
- T40.8X4SPoisoning by lysergide [LSD], undetermined, sequela
- T40.9Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]
- T40.90Poisoning by, adverse effect of and underdosing of unspecified psychodysleptics [hallucinogens]
- T40.901Poisoning by unspecified psychodysleptics [hallucinogens], accidental (unintentional)
- 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
- T40.902Poisoning by unspecified psychodysleptics [hallucinogens], intentional self-harm
- 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
- T40.903Poisoning by unspecified psychodysleptics [hallucinogens], assault
- 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
- T40.904Poisoning by unspecified psychodysleptics [hallucinogens], undetermined
- 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
- T40.905Adverse effect of unspecified psychodysleptics [hallucinogens]
- 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
- T40.906Underdosing of unspecified psychodysleptics [hallucinogens]
- T40.906AUnderdosing of unspecified psychodysleptics [hallucinogens], initial encounter
- T40.906DUnderdosing of unspecified psychodysleptics [hallucinogens], subsequent encounter
- T40.906SUnderdosing of unspecified psychodysleptics [hallucinogens], sequela
- T40.99Poisoning by, adverse effect of and underdosing of other psychodysleptics [hallucinogens]
- T40.991Poisoning by other psychodysleptics [hallucinogens], accidental (unintentional)
- 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
- T40.992Poisoning by other psychodysleptics [hallucinogens], intentional self-harm
- 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
- T40.993Poisoning by other psychodysleptics [hallucinogens], assault
- 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
- T40.994Poisoning by other psychodysleptics [hallucinogens], undetermined
- 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
- T40.995Adverse effect of other psychodysleptics [hallucinogens]
- 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
- T40.996Underdosing of other psychodysleptics [hallucinogens]
- T40.996AUnderdosing of other psychodysleptics [hallucinogens], initial encounter
- T40.996DUnderdosing of other psychodysleptics [hallucinogens], subsequent encounter
- T40.996SUnderdosing of other psychodysleptics [hallucinogens], sequela
T40 MS-DRGs
As the principal diagnosis, the billable codes under T40 group to these 9 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 949 Aftercare with CC/MCC (99 of 258 codes)
- DRG 950 Aftercare without CC/MCC (99 of 258 codes)
- DRG 917 Poisoning and Toxic Effects of Drugs with MCC (73 of 258 codes)
- DRG 918 Poisoning and Toxic Effects of Drugs without MCC (73 of 258 codes)
- DRG 922 Other Injury, Poisoning and Toxic Effect Diagnoses with MCC (73 of 258 codes)
- DRG 923 Other Injury, Poisoning and Toxic Effect Diagnoses without MCC (73 of 258 codes)
- DRG 791 Prematurity with Major Problems (13 of 258 codes)
- DRG 793 Full Term Neonate with Major Problems (13 of 258 codes)
- DRG 951 Other Factors Influencing Health Status (13 of 258 codes)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Drug Reactions
Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies.
Read more about drug reactions on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.