Chapter 19

S00–T88: Injury, Poisoning and Certain Other Consequences of External Causes

Injury, Poisoning and Certain Other Consequences of External Causes diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)
Internal Codes
  • 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

  • T43|

    Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified

  • T43.0|

    Poisoning by, adverse effect of and underdosing of tricyclic and tetracyclic antidepressants

  • T43.01|

    Poisoning by, adverse effect of and underdosing of tricyclic antidepressants

  • T43.011|

    Poisoning by tricyclic antidepressants, accidental (unintentional)

  • T43.011A|

    Poisoning by tricyclic antidepressants, accidental (unintentional), initial encounter

  • T43.011D|

    Poisoning by tricyclic antidepressants, accidental (unintentional), subsequent encounter

  • T43.011S|

    Poisoning by tricyclic antidepressants, accidental (unintentional), sequela

  • T43.012|

    Poisoning by tricyclic antidepressants, intentional self-harm

  • T43.012A|

    Poisoning by tricyclic antidepressants, intentional self-harm, initial encounter

  • T43.012D|

    Poisoning by tricyclic antidepressants, intentional self-harm, subsequent encounter

  • T43.012S|

    Poisoning by tricyclic antidepressants, intentional self-harm, sequela

  • T43.013|

    Poisoning by tricyclic antidepressants, assault

  • T43.013A|

    Poisoning by tricyclic antidepressants, assault, initial encounter

  • T43.013D|

    Poisoning by tricyclic antidepressants, assault, subsequent encounter

  • T43.013S|

    Poisoning by tricyclic antidepressants, assault, sequela

  • T43.014|

    Poisoning by tricyclic antidepressants, undetermined

  • T43.014A|

    Poisoning by tricyclic antidepressants, undetermined, initial encounter

  • T43.014D|

    Poisoning by tricyclic antidepressants, undetermined, subsequent encounter

  • T43.014S|

    Poisoning by tricyclic antidepressants, undetermined, sequela

  • T43.015|

    Adverse effect of tricyclic antidepressants

  • T43.015A|

    Adverse effect of tricyclic antidepressants, initial encounter

  • T43.015D|

    Adverse effect of tricyclic antidepressants, subsequent encounter

  • T43.015S|

    Adverse effect of tricyclic antidepressants, sequela

  • T43.016|

    Underdosing of tricyclic antidepressants

  • T43.016A|

    Underdosing of tricyclic antidepressants, initial encounter

  • T43.016D|

    Underdosing of tricyclic antidepressants, subsequent encounter

  • T43.016S|

    Underdosing of tricyclic antidepressants, sequela

  • T43.02|

    Poisoning by, adverse effect of and underdosing of tetracyclic antidepressants

  • T43.021|

    Poisoning by tetracyclic antidepressants, accidental (unintentional)

  • T43.021A|

    Poisoning by tetracyclic antidepressants, accidental (unintentional), initial encounter

  • T43.021D|

    Poisoning by tetracyclic antidepressants, accidental (unintentional), subsequent encounter

  • T43.021S|

    Poisoning by tetracyclic antidepressants, accidental (unintentional), sequela

  • T43.022|

    Poisoning by tetracyclic antidepressants, intentional self-harm

  • T43.022A|

    Poisoning by tetracyclic antidepressants, intentional self-harm, initial encounter

  • T43.022D|

    Poisoning by tetracyclic antidepressants, intentional self-harm, subsequent encounter

  • T43.022S|

    Poisoning by tetracyclic antidepressants, intentional self-harm, sequela

  • T43.023|

    Poisoning by tetracyclic antidepressants, assault

  • T43.023A|

    Poisoning by tetracyclic antidepressants, assault, initial encounter

  • T43.023D|

    Poisoning by tetracyclic antidepressants, assault, subsequent encounter

  • T43.023S|

    Poisoning by tetracyclic antidepressants, assault, sequela

  • T43.024|

    Poisoning by tetracyclic antidepressants, undetermined

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