ICD-10-CM Code T42: Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs and Related Diagnosis Codes.


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A categorized list of ICD-10-CM codes organized by chapters based on body systems or medical conditions, according to the International Classification of Diseases, Tenth Revision, Clinical Modification.

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  • T42 - Poisoning by, adverse effect of and underdosing of antiepileptic, sedative- hypnotic and antiparkinsonism drugs
    • T42.0 - Poisoning by, adverse effect of and underdosing of hydantoin derivatives
      • T42.0X - Poisoning by, adverse effect of and underdosing of hydantoin derivatives
        • T42.0X1 - Poisoning by hydantoin derivatives, accidental (unintentional)
          • T42.0X1A - Poisoning by hydantoin derivatives, accidental (unintentional), initial encounter
          • T42.0X1D - Poisoning by hydantoin derivatives, accidental (unintentional), subsequent encounter
          • T42.0X1S - Poisoning by hydantoin derivatives, accidental (unintentional), sequela
        • T42.0X2 - Poisoning by hydantoin derivatives, intentional self-harm
          • T42.0X2A - Poisoning by hydantoin derivatives, intentional self-harm, initial encounter
          • T42.0X2D - Poisoning by hydantoin derivatives, intentional self-harm, subsequent encounter
          • T42.0X2S - Poisoning by hydantoin derivatives, intentional self-harm, sequela
        • T42.0X3 - Poisoning by hydantoin derivatives, assault
          • T42.0X3A - Poisoning by hydantoin derivatives, assault, initial encounter
          • T42.0X3D - Poisoning by hydantoin derivatives, assault, subsequent encounter
          • T42.0X3S - Poisoning by hydantoin derivatives, assault, sequela
        • T42.0X4 - Poisoning by hydantoin derivatives, undetermined
          • T42.0X4A - Poisoning by hydantoin derivatives, undetermined, initial encounter
          • T42.0X4D - Poisoning by hydantoin derivatives, undetermined, subsequent encounter
          • T42.0X4S - Poisoning by hydantoin derivatives, undetermined, sequela
        • T42.0X5 - Adverse effect of hydantoin derivatives
          • T42.0X5A - Adverse effect of hydantoin derivatives, initial encounter
          • T42.0X5D - Adverse effect of hydantoin derivatives, subsequent encounter
          • T42.0X5S - Adverse effect of hydantoin derivatives, sequela
        • T42.0X6 - Underdosing of hydantoin derivatives
          • T42.0X6A - Underdosing of hydantoin derivatives, initial encounter
          • T42.0X6D - Underdosing of hydantoin derivatives, subsequent encounter
          • T42.0X6S - Underdosing of hydantoin derivatives, sequela
    • T42.1 - Poisoning by, adverse effect of and underdosing of iminostilbenes
      • T42.1X - Poisoning by, adverse effect of and underdosing of iminostilbenes
        • T42.1X1 - Poisoning by iminostilbenes, accidental (unintentional)
          • T42.1X1A - Poisoning by iminostilbenes, accidental (unintentional), initial encounter
          • T42.1X1D - Poisoning by iminostilbenes, accidental (unintentional), subsequent encounter
          • T42.1X1S - Poisoning by iminostilbenes, accidental (unintentional), sequela
        • T42.1X2 - Poisoning by iminostilbenes, intentional self-harm
          • T42.1X2A - Poisoning by iminostilbenes, intentional self-harm, initial encounter
          • T42.1X2D - Poisoning by iminostilbenes, intentional self-harm, subsequent encounter
          • T42.1X2S - Poisoning by iminostilbenes, intentional self-harm, sequela
        • T42.1X3 - Poisoning by iminostilbenes, assault
          • T42.1X3A - Poisoning by iminostilbenes, assault, initial encounter
          • T42.1X3D - Poisoning by iminostilbenes, assault, subsequent encounter
          • T42.1X3S - Poisoning by iminostilbenes, assault, sequela
        • T42.1X4 - Poisoning by iminostilbenes, undetermined
          • T42.1X4A - Poisoning by iminostilbenes, undetermined, initial encounter
          • T42.1X4D - Poisoning by iminostilbenes, undetermined, subsequent encounter
          • T42.1X4S - Poisoning by iminostilbenes, undetermined, sequela
        • T42.1X5 - Adverse effect of iminostilbenes
          • T42.1X5A - Adverse effect of iminostilbenes, initial encounter
          • T42.1X5D - Adverse effect of iminostilbenes, subsequent encounter
          • T42.1X5S - Adverse effect of iminostilbenes, sequela
        • T42.1X6 - Underdosing of iminostilbenes
          • T42.1X6A - Underdosing of iminostilbenes, initial encounter
          • T42.1X6D - Underdosing of iminostilbenes, subsequent encounter
          • T42.1X6S - Underdosing of iminostilbenes, sequela
    • T42.2 - Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones
      • T42.2X - Poisoning by, adverse effect of and underdosing of succinimides and oxazolidinediones
        • T42.2X1 - Poisoning by succinimides and oxazolidinediones, accidental (unintentional)
          • T42.2X1A - Poisoning by succinimides and oxazolidinediones, accidental (unintentional), initial encounter
          • T42.2X1D - Poisoning by succinimides and oxazolidinediones, accidental (unintentional), subsequent encounter
          • T42.2X1S - Poisoning by succinimides and oxazolidinediones, accidental (unintentional), sequela
        • T42.2X2 - Poisoning by succinimides and oxazolidinediones, intentional self-harm
          • T42.2X2A - Poisoning by succinimides and oxazolidinediones, intentional self-harm, initial encounter
          • T42.2X2D - Poisoning by succinimides and oxazolidinediones, intentional self-harm, subsequent encounter
          • T42.2X2S - Poisoning by succinimides and oxazolidinediones, intentional self-harm, sequela
        • T42.2X3 - Poisoning by succinimides and oxazolidinediones, assault
          • T42.2X3A - Poisoning by succinimides and oxazolidinediones, assault, initial encounter
          • T42.2X3D - Poisoning by succinimides and oxazolidinediones, assault, subsequent encounter
          • T42.2X3S - Poisoning by succinimides and oxazolidinediones, assault, sequela
        • T42.2X4 - Poisoning by succinimides and oxazolidinediones, undetermined
          • T42.2X4A - Poisoning by succinimides and oxazolidinediones, undetermined, initial encounter
          • T42.2X4D - Poisoning by succinimides and oxazolidinediones, undetermined, subsequent encounter
          • T42.2X4S - Poisoning by succinimides and oxazolidinediones, undetermined, sequela
        • T42.2X5 - Adverse effect of succinimides and oxazolidinediones
          • T42.2X5A - Adverse effect of succinimides and oxazolidinediones, initial encounter
          • T42.2X5D - Adverse effect of succinimides and oxazolidinediones, subsequent encounter
          • T42.2X5S - Adverse effect of succinimides and oxazolidinediones, sequela
        • T42.2X6 - Underdosing of succinimides and oxazolidinediones
          • T42.2X6A - Underdosing of succinimides and oxazolidinediones, initial encounter
          • T42.2X6D - Underdosing of succinimides and oxazolidinediones, subsequent encounter
          • T42.2X6S - Underdosing of succinimides and oxazolidinediones, sequela
    • T42.3 - Poisoning by, adverse effect of and underdosing of barbiturates
      • T42.3X - Poisoning by, adverse effect of and underdosing of barbiturates
        • T42.3X1 - Poisoning by barbiturates, accidental (unintentional)
          • T42.3X1A - Poisoning by barbiturates, accidental (unintentional), initial encounter
          • T42.3X1D - Poisoning by barbiturates, accidental (unintentional), subsequent encounter
          • T42.3X1S - Poisoning by barbiturates, accidental (unintentional), sequela
        • T42.3X2 - Poisoning by barbiturates, intentional self-harm
          • T42.3X2A - Poisoning by barbiturates, intentional self-harm, initial encounter
          • T42.3X2D - Poisoning by barbiturates, intentional self-harm, subsequent encounter
          • T42.3X2S - Poisoning by barbiturates, intentional self-harm, sequela
        • T42.3X3 - Poisoning by barbiturates, assault
          • T42.3X3A - Poisoning by barbiturates, assault, initial encounter
          • T42.3X3D - Poisoning by barbiturates, assault, subsequent encounter
          • T42.3X3S - Poisoning by barbiturates, assault, sequela
        • T42.3X4 - Poisoning by barbiturates, undetermined
          • T42.3X4A - Poisoning by barbiturates, undetermined, initial encounter
          • T42.3X4D - Poisoning by barbiturates, undetermined, subsequent encounter
          • T42.3X4S - Poisoning by barbiturates, undetermined, sequela
        • T42.3X5 - Adverse effect of barbiturates
          • T42.3X5A - Adverse effect of barbiturates, initial encounter
          • T42.3X5D - Adverse effect of barbiturates, subsequent encounter
          • T42.3X5S - Adverse effect of barbiturates, sequela
        • T42.3X6 - Underdosing of barbiturates
          • T42.3X6A - Underdosing of barbiturates, initial encounter
          • T42.3X6D - Underdosing of barbiturates, subsequent encounter
          • T42.3X6S - Underdosing of barbiturates, sequela
    • T42.4 - Poisoning by, adverse effect of and underdosing of benzodiazepines
      • T42.4X - Poisoning by, adverse effect of and underdosing of benzodiazepines
        • T42.4X1 - Poisoning by benzodiazepines, accidental (unintentional)
          • T42.4X1A - Poisoning by benzodiazepines, accidental (unintentional), initial encounter
          • T42.4X1D - Poisoning by benzodiazepines, accidental (unintentional), subsequent encounter
          • T42.4X1S - Poisoning by benzodiazepines, accidental (unintentional), sequela
        • T42.4X2 - Poisoning by benzodiazepines, intentional self-harm
          • T42.4X2A - Poisoning by benzodiazepines, intentional self-harm, initial encounter
          • T42.4X2D - Poisoning by benzodiazepines, intentional self-harm, subsequent encounter
          • T42.4X2S - Poisoning by benzodiazepines, intentional self-harm, sequela
        • T42.4X3 - Poisoning by benzodiazepines, assault
          • T42.4X3A - Poisoning by benzodiazepines, assault, initial encounter
          • T42.4X3D - Poisoning by benzodiazepines, assault, subsequent encounter
          • T42.4X3S - Poisoning by benzodiazepines, assault, sequela
        • T42.4X4 - Poisoning by benzodiazepines, undetermined
          • T42.4X4A - Poisoning by benzodiazepines, undetermined, initial encounter
          • T42.4X4D - Poisoning by benzodiazepines, undetermined, subsequent encounter
          • T42.4X4S - Poisoning by benzodiazepines, undetermined, sequela
        • T42.4X5 - Adverse effect of benzodiazepines
          • T42.4X5A - Adverse effect of benzodiazepines, initial encounter
          • T42.4X5D - Adverse effect of benzodiazepines, subsequent encounter
          • T42.4X5S - Adverse effect of benzodiazepines, sequela
        • T42.4X6 - Underdosing of benzodiazepines
          • T42.4X6A - Underdosing of benzodiazepines, initial encounter
          • T42.4X6D - Underdosing of benzodiazepines, subsequent encounter
          • T42.4X6S - Underdosing of benzodiazepines, sequela
    • T42.5 - Poisoning by, adverse effect of and underdosing of mixed antiepileptics
      • T42.5X - Poisoning by, adverse effect of and underdosing of antiepileptics
        • T42.5X1 - Poisoning by mixed antiepileptics, accidental (unintentional)
          • T42.5X1A - Poisoning by mixed antiepileptics, accidental (unintentional), initial encounter
          • T42.5X1D - Poisoning by mixed antiepileptics, accidental (unintentional), subsequent encounter
          • T42.5X1S - Poisoning by mixed antiepileptics, accidental (unintentional), sequela
        • T42.5X2 - Poisoning by mixed antiepileptics, intentional self-harm
          • T42.5X2A - Poisoning by mixed antiepileptics, intentional self-harm, initial encounter
          • T42.5X2D - Poisoning by mixed antiepileptics, intentional self-harm, subsequent encounter
          • T42.5X2S - Poisoning by mixed antiepileptics, intentional self-harm, sequela
        • T42.5X3 - Poisoning by mixed antiepileptics, assault
          • T42.5X3A - Poisoning by mixed antiepileptics, assault, initial encounter
          • T42.5X3D - Poisoning by mixed antiepileptics, assault, subsequent encounter
          • T42.5X3S - Poisoning by mixed antiepileptics, assault, sequela
        • T42.5X4 - Poisoning by mixed antiepileptics, undetermined
          • T42.5X4A - Poisoning by mixed antiepileptics, undetermined, initial encounter
          • T42.5X4D - Poisoning by mixed antiepileptics, undetermined, subsequent encounter
          • T42.5X4S - Poisoning by mixed antiepileptics, undetermined, sequela
        • T42.5X5 - Adverse effect of mixed antiepileptics
          • T42.5X5A - Adverse effect of mixed antiepileptics, initial encounter
          • T42.5X5D - Adverse effect of mixed antiepileptics, subsequent encounter
          • T42.5X5S - Adverse effect of mixed antiepileptics, sequela
        • T42.5X6 - Underdosing of mixed antiepileptics
          • T42.5X6A - Underdosing of mixed antiepileptics, initial encounter
          • T42.5X6D - Underdosing of mixed antiepileptics, subsequent encounter
          • T42.5X6S - Underdosing of mixed antiepileptics, sequela
    • T42.6 - Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
      • T42.6X - Poisoning by, adverse effect of and underdosing of other antiepileptic and sedative-hypnotic drugs
        • T42.6X1 - Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional)
          • T42.6X1A - Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter
          • T42.6X1D - Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter
          • T42.6X1S - Poisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela
        • T42.6X2 - Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm
          • T42.6X2A - Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter
          • T42.6X2D - Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter
          • T42.6X2S - Poisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela
        • T42.6X3 - Poisoning by other antiepileptic and sedative-hypnotic drugs, assault
          • T42.6X3A - Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, initial encounter
          • T42.6X3D - Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter
          • T42.6X3S - Poisoning by other antiepileptic and sedative-hypnotic drugs, assault, sequela
        • T42.6X4 - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined
          • T42.6X4A - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter
          • T42.6X4D - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter
          • T42.6X4S - Poisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, sequela
        • T42.6X5 - Adverse effect of other antiepileptic and sedative-hypnotic drugs
          • T42.6X5A - Adverse effect of other antiepileptic and sedative-hypnotic drugs, initial encounter
          • T42.6X5D - Adverse effect of other antiepileptic and sedative-hypnotic drugs, subsequent encounter
          • T42.6X5S - Adverse effect of other antiepileptic and sedative-hypnotic drugs, sequela
        • T42.6X6 - Underdosing of other antiepileptic and sedative-hypnotic drugs
          • T42.6X6A - Underdosing of other antiepileptic and sedative-hypnotic drugs, initial encounter
          • T42.6X6D - Underdosing of other antiepileptic and sedative-hypnotic drugs, subsequent encounter
          • T42.6X6S - Underdosing of other antiepileptic and sedative-hypnotic drugs, sequela
    • T42.7 - Poisoning by, adverse effect of and underdosing of unspecified antiepileptic and sedative-hypnotic drugs
      • T42.71 - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional)
        • T42.71XA - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounter
        • T42.71XD - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), subsequent encounter
        • T42.71XS - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), sequela
      • T42.72 - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm
        • T42.72XA - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounter
        • T42.72XD - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, subsequent encounter
        • T42.72XS - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, sequela
      • T42.73 - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault
        • T42.73XA - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounter
        • T42.73XD - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, subsequent encounter
        • T42.73XS - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, sequela
      • T42.74 - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined
        • T42.74XA - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounter
        • T42.74XD - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, subsequent encounter
        • T42.74XS - Poisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, sequela
      • T42.75 - Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs
        • T42.75XA - Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter
        • T42.75XD - Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter
        • T42.75XS - Adverse effect of unspecified antiepileptic and sedative-hypnotic drugs, sequela
      • T42.76 - Underdosing of unspecified antiepileptic and sedative-hypnotic drugs
        • T42.76XA - Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, initial encounter
        • T42.76XD - Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, subsequent encounter
        • T42.76XS - Underdosing of unspecified antiepileptic and sedative-hypnotic drugs, sequela
    • T42.8 - Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants
      • T42.8X - Poisoning by, adverse effect of and underdosing of antiparkinsonism drugs and other central muscle-tone depressants
        • T42.8X1 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional)
          • T42.8X1A - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), initial encounter
          • T42.8X1D - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), subsequent encounter
          • T42.8X1S - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, accidental (unintentional), sequela
        • T42.8X2 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm
          • T42.8X2A - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, initial encounter
          • T42.8X2D - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, subsequent encounter
          • T42.8X2S - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, intentional self-harm, sequela
        • T42.8X3 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault
          • T42.8X3A - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, initial encounter
          • T42.8X3D - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, subsequent encounter
          • T42.8X3S - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, assault, sequela
        • T42.8X4 - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined
          • T42.8X4A - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, initial encounter
          • T42.8X4D - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, subsequent encounter
          • T42.8X4S - Poisoning by antiparkinsonism drugs and other central muscle-tone depressants, undetermined, sequela
        • T42.8X5 - Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants
          • T42.8X5A - Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter
          • T42.8X5D - Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter
          • T42.8X5S - Adverse effect of antiparkinsonism drugs and other central muscle-tone depressants, sequela
        • T42.8X6 - Underdosing of antiparkinsonism drugs and other central muscle-tone depressants
          • T42.8X6A - Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, initial encounter
          • T42.8X6D - Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, subsequent encounter
          • T42.8X6S - Underdosing of antiparkinsonism drugs and other central muscle-tone depressants, sequela

Note: The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes are developed and maintained by the Centers for Disease Control and Prevention (CDC). CDC's National Center for Health Statistics (NCHS) is responsible for the clinical modification of ICD-10 for use in the United States. The World Health Organization (WHO), which owns and publishes ICD-10, authorized NCHS to develop ICD-10-CM. All modifications to ICD-10 must conform to WHO's established ICD structure and conventions. All rights are reserved by the respective entities.