ICD-10-CM category
T42 Poisoning by antiepileptic, sedative-hypnotic and antiparkinsonism drugs
T42 is a category, not a billable code. Report one of the 162 complete codes below.
T42.0…
18 codes
- T42.0X1APoisoning by hydantoin derivatives, accidental (unintentional), initial encounter
- T42.0X1DPoisoning by hydantoin derivatives, accidental (unintentional), subsequent encounter
- T42.0X1SPoisoning by hydantoin derivatives, accidental (unintentional), sequela
- T42.0X2APoisoning by hydantoin derivatives, intentional self-harm, initial encounter
- T42.0X2DPoisoning by hydantoin derivatives, intentional self-harm, subsequent encounter
- T42.0X2SPoisoning by hydantoin derivatives, intentional self-harm, sequela
- T42.0X3APoisoning by hydantoin derivatives, assault, initial encounter
- T42.0X3DPoisoning by hydantoin derivatives, assault, subsequent encounter
- T42.0X3SPoisoning by hydantoin derivatives, assault, sequela
- T42.0X4APoisoning by hydantoin derivatives, undetermined, initial encounter
- T42.0X4DPoisoning by hydantoin derivatives, undetermined, subsequent encounter
- T42.0X4SPoisoning by hydantoin derivatives, undetermined, sequela
- T42.0X5AAdverse effect of hydantoin derivatives, initial encounter
- T42.0X5DAdverse effect of hydantoin derivatives, subsequent encounter
- T42.0X5SAdverse effect of hydantoin derivatives, sequela
- T42.0X6AUnderdosing of hydantoin derivatives, initial encounter
- T42.0X6DUnderdosing of hydantoin derivatives, subsequent encounter
- T42.0X6SUnderdosing of hydantoin derivatives, sequela
T42.1…
18 codes
- T42.1X1APoisoning by iminostilbenes, accidental (unintentional), initial encounter
- T42.1X1DPoisoning by iminostilbenes, accidental (unintentional), subsequent encounter
- T42.1X1SPoisoning by iminostilbenes, accidental (unintentional), sequela
- T42.1X2APoisoning by iminostilbenes, intentional self-harm, initial encounter
- T42.1X2DPoisoning by iminostilbenes, intentional self-harm, subsequent encounter
- T42.1X2SPoisoning by iminostilbenes, intentional self-harm, sequela
- T42.1X3APoisoning by iminostilbenes, assault, initial encounter
- T42.1X3DPoisoning by iminostilbenes, assault, subsequent encounter
- T42.1X3SPoisoning by iminostilbenes, assault, sequela
- T42.1X4APoisoning by iminostilbenes, undetermined, initial encounter
- T42.1X4DPoisoning by iminostilbenes, undetermined, subsequent encounter
- T42.1X4SPoisoning by iminostilbenes, undetermined, sequela
- T42.1X5AAdverse effect of iminostilbenes, initial encounter
- T42.1X5DAdverse effect of iminostilbenes, subsequent encounter
- T42.1X5SAdverse effect of iminostilbenes, sequela
- T42.1X6AUnderdosing of iminostilbenes, initial encounter
- T42.1X6DUnderdosing of iminostilbenes, subsequent encounter
- T42.1X6SUnderdosing of iminostilbenes, sequela
T42.2…
18 codes
- T42.2X1APoisoning by succinimides and oxazolidinediones, accidental (unintentional), initial encounter
- T42.2X1DPoisoning by succinimides and oxazolidinediones, accidental (unintentional), subsequent encounter
- T42.2X1SPoisoning by succinimides and oxazolidinediones, accidental (unintentional), sequela
- T42.2X2APoisoning by succinimides and oxazolidinediones, intentional self-harm, initial encounter
- T42.2X2DPoisoning by succinimides and oxazolidinediones, intentional self-harm, subsequent encounter
- T42.2X2SPoisoning by succinimides and oxazolidinediones, intentional self-harm, sequela
- T42.2X3APoisoning by succinimides and oxazolidinediones, assault, initial encounter
- T42.2X3DPoisoning by succinimides and oxazolidinediones, assault, subsequent encounter
- T42.2X3SPoisoning by succinimides and oxazolidinediones, assault, sequela
- T42.2X4APoisoning by succinimides and oxazolidinediones, undetermined, initial encounter
- T42.2X4DPoisoning by succinimides and oxazolidinediones, undetermined, subsequent encounter
- T42.2X4SPoisoning by succinimides and oxazolidinediones, undetermined, sequela
- T42.2X5AAdverse effect of succinimides and oxazolidinediones, initial encounter
- T42.2X5DAdverse effect of succinimides and oxazolidinediones, subsequent encounter
- T42.2X5SAdverse effect of succinimides and oxazolidinediones, sequela
- T42.2X6AUnderdosing of succinimides and oxazolidinediones, initial encounter
- T42.2X6DUnderdosing of succinimides and oxazolidinediones, subsequent encounter
- T42.2X6SUnderdosing of succinimides and oxazolidinediones, sequela
T42.3…
18 codes
- T42.3X1APoisoning by barbiturates, accidental (unintentional), initial encounter
- T42.3X1DPoisoning by barbiturates, accidental (unintentional), subsequent encounter
- T42.3X1SPoisoning by barbiturates, accidental (unintentional), sequela
- T42.3X2APoisoning by barbiturates, intentional self-harm, initial encounter
- T42.3X2DPoisoning by barbiturates, intentional self-harm, subsequent encounter
- T42.3X2SPoisoning by barbiturates, intentional self-harm, sequela
- T42.3X3APoisoning by barbiturates, assault, initial encounter
- T42.3X3DPoisoning by barbiturates, assault, subsequent encounter
- T42.3X3SPoisoning by barbiturates, assault, sequela
- T42.3X4APoisoning by barbiturates, undetermined, initial encounter
- T42.3X4DPoisoning by barbiturates, undetermined, subsequent encounter
- T42.3X4SPoisoning by barbiturates, undetermined, sequela
- T42.3X5AAdverse effect of barbiturates, initial encounter
- T42.3X5DAdverse effect of barbiturates, subsequent encounter
- T42.3X5SAdverse effect of barbiturates, sequela
- T42.3X6AUnderdosing of barbiturates, initial encounter
- T42.3X6DUnderdosing of barbiturates, subsequent encounter
- T42.3X6SUnderdosing of barbiturates, sequela
T42.4…
18 codes
- T42.4X1APoisoning by benzodiazepines, accidental (unintentional), initial encounter
- T42.4X1DPoisoning by benzodiazepines, accidental (unintentional), subsequent encounter
- T42.4X1SPoisoning by benzodiazepines, accidental (unintentional), sequela
- T42.4X2APoisoning by benzodiazepines, intentional self-harm, initial encounter
- T42.4X2DPoisoning by benzodiazepines, intentional self-harm, subsequent encounter
- T42.4X2SPoisoning by benzodiazepines, intentional self-harm, sequela
- T42.4X3APoisoning by benzodiazepines, assault, initial encounter
- T42.4X3DPoisoning by benzodiazepines, assault, subsequent encounter
- T42.4X3SPoisoning by benzodiazepines, assault, sequela
- T42.4X4APoisoning by benzodiazepines, undetermined, initial encounter
- T42.4X4DPoisoning by benzodiazepines, undetermined, subsequent encounter
- T42.4X4SPoisoning by benzodiazepines, undetermined, sequela
- T42.4X5AAdverse effect of benzodiazepines, initial encounter
- T42.4X5DAdverse effect of benzodiazepines, subsequent encounter
- T42.4X5SAdverse effect of benzodiazepines, sequela
- T42.4X6AUnderdosing of benzodiazepines, initial encounter
- T42.4X6DUnderdosing of benzodiazepines, subsequent encounter
- T42.4X6SUnderdosing of benzodiazepines, sequela
T42.5…
18 codes
- T42.5X1APoisoning by mixed antiepileptics, accidental (unintentional), initial encounter
- T42.5X1DPoisoning by mixed antiepileptics, accidental (unintentional), subsequent encounter
- T42.5X1SPoisoning by mixed antiepileptics, accidental (unintentional), sequela
- T42.5X2APoisoning by mixed antiepileptics, intentional self-harm, initial encounter
- T42.5X2DPoisoning by mixed antiepileptics, intentional self-harm, subsequent encounter
- T42.5X2SPoisoning by mixed antiepileptics, intentional self-harm, sequela
- T42.5X3APoisoning by mixed antiepileptics, assault, initial encounter
- T42.5X3DPoisoning by mixed antiepileptics, assault, subsequent encounter
- T42.5X3SPoisoning by mixed antiepileptics, assault, sequela
- T42.5X4APoisoning by mixed antiepileptics, undetermined, initial encounter
- T42.5X4DPoisoning by mixed antiepileptics, undetermined, subsequent encounter
- T42.5X4SPoisoning by mixed antiepileptics, undetermined, sequela
- T42.5X5AAdverse effect of mixed antiepileptics, initial encounter
- T42.5X5DAdverse effect of mixed antiepileptics, subsequent encounter
- T42.5X5SAdverse effect of mixed antiepileptics, sequela
- T42.5X6AUnderdosing of mixed antiepileptics, initial encounter
- T42.5X6DUnderdosing of mixed antiepileptics, subsequent encounter
- T42.5X6SUnderdosing of mixed antiepileptics, sequela
T42.6…
18 codes
- T42.6X1APoisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter
- T42.6X1DPoisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter
- T42.6X1SPoisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela
- T42.6X2APoisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter
- T42.6X2DPoisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter
- T42.6X2SPoisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela
- T42.6X3APoisoning by other antiepileptic and sedative-hypnotic drugs, assault, initial encounter
- T42.6X3DPoisoning by other antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter
- T42.6X3SPoisoning by other antiepileptic and sedative-hypnotic drugs, assault, sequela
- T42.6X4APoisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter
- T42.6X4DPoisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter
- T42.6X4SPoisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, sequela
- T42.6X5AAdverse effect of other antiepileptic and sedative-hypnotic drugs, initial encounter
- T42.6X5DAdverse effect of other antiepileptic and sedative-hypnotic drugs, subsequent encounter
- T42.6X5SAdverse effect of other antiepileptic and sedative-hypnotic drugs, sequela
- T42.6X6AUnderdosing of other antiepileptic and sedative-hypnotic drugs, initial encounter
- T42.6X6DUnderdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter
- T42.6X6SUnderdosing of other antiepileptic and sedative-hypnotic drugs, sequela
T42.7…
18 codes
- T42.71XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter
- T42.71XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter
- T42.71XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela
- T42.72XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter
- T42.72XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter
- T42.72XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela
- T42.73XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounter
- T42.73XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter
- T42.73XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequela
- T42.74XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter
- T42.74XDPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter
- T42.74XSPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequela
- T42.75XAAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter
- T42.75XDAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter
- T42.75XSAdverse effect of unspecified antiepileptic and sedative-hypnotic drugs, sequela
- T42.76XAUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter
- T42.76XDUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter
- T42.76XSUnderdosing of unspecified antiepileptic and sedative-hypnotic drugs, sequela
T42.8…
18 codes
- T42.8X1APoisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), initial encounter
- T42.8X1DPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), subsequent encounter
- T42.8X1SPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), sequela
- T42.8X2APoisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, initial encounter
- T42.8X2DPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, subsequent encounter
- T42.8X2SPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, sequela
- T42.8X3APoisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, initial encounter
- T42.8X3DPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, subsequent encounter
- T42.8X3SPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, sequela
- T42.8X4APoisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, initial encounter
- T42.8X4DPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, subsequent encounter
- T42.8X4SPoisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, sequela
- T42.8X5AAdverse effect of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter
- T42.8X5DAdverse effect of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter
- T42.8X5SAdverse effect of antiparkinsonism drugs and other central muscle-tone depressants, sequela
- T42.8X6AUnderdosing of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter
- T42.8X6DUnderdosing of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter
- T42.8X6SUnderdosing of antiparkinsonism drugs and other central muscle-tone depressants, sequela
Outside the US? T42 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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