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.)

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Use Additional Code

code to identify any retained foreign body, if applicable (Z18.-)

All Codes Billable Only

Internal Codes

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T45.3X6S|
Underdosing of enzymes, sequela
T45.4|
Poisoning by, adverse effect of and underdosing of iron and its compounds
T45.4X|
Poisoning by, adverse effect of and underdosing of iron and its compounds
T45.4X1|
Poisoning by iron and its compounds, accidental (unintentional)
T45.4X1A|
Poisoning by iron and its compounds, accidental (unintentional), initial encounter
T45.4X1D|
Poisoning by iron and its compounds, accidental (unintentional), subsequent encounter
T45.4X1S|
Poisoning by iron and its compounds, accidental (unintentional), sequela
T45.4X2|
Poisoning by iron and its compounds, intentional self-harm
T45.4X2A|
Poisoning by iron and its compounds, intentional self-harm, initial encounter
T45.4X2D|
Poisoning by iron and its compounds, intentional self-harm, subsequent encounter
T45.4X2S|
Poisoning by iron and its compounds, intentional self-harm, sequela
T45.4X3|
Poisoning by iron and its compounds, assault
T45.4X3A|
Poisoning by iron and its compounds, assault, initial encounter
T45.4X3D|
Poisoning by iron and its compounds, assault, subsequent encounter
T45.4X3S|
Poisoning by iron and its compounds, assault, sequela
T45.4X4|
Poisoning by iron and its compounds, undetermined
T45.4X4A|
Poisoning by iron and its compounds, undetermined, initial encounter
T45.4X4D|
Poisoning by iron and its compounds, undetermined, subsequent encounter
T45.4X4S|
Poisoning by iron and its compounds, undetermined, sequela
T45.4X5|
Adverse effect of iron and its compounds
T45.4X5A|
Adverse effect of iron and its compounds, initial encounter
T45.4X5D|
Adverse effect of iron and its compounds, subsequent encounter
T45.4X5S|
Adverse effect of iron and its compounds, sequela
T45.4X6|
Underdosing of iron and its compounds
T45.4X6A|
Underdosing of iron and its compounds, initial encounter
T45.4X6D|
Underdosing of iron and its compounds, subsequent encounter
T45.4X6S|
Underdosing of iron and its compounds, sequela
T45.5|
Poisoning by, adverse effect of and underdosing of anticoagulants and antithrombotic drugs
T45.51|
Poisoning by, adverse effect of and underdosing of anticoagulants
T45.511|
Poisoning by anticoagulants, accidental (unintentional)
T45.511A|
Poisoning by anticoagulants, accidental (unintentional), initial encounter
T45.511D|
Poisoning by anticoagulants, accidental (unintentional), subsequent encounter
T45.511S|
Poisoning by anticoagulants, accidental (unintentional), sequela
T45.512|
Poisoning by anticoagulants, intentional self-harm
T45.512A|
Poisoning by anticoagulants, intentional self-harm, initial encounter
T45.512D|
Poisoning by anticoagulants, intentional self-harm, subsequent encounter
T45.512S|
Poisoning by anticoagulants, intentional self-harm, sequela
T45.513|
Poisoning by anticoagulants, assault
T45.513A|
Poisoning by anticoagulants, assault, initial encounter
T45.513D|
Poisoning by anticoagulants, assault, subsequent encounter
T45.513S|
Poisoning by anticoagulants, assault, sequela
T45.514|
Poisoning by anticoagulants, undetermined
T45.514A|
Poisoning by anticoagulants, undetermined, initial encounter
T45.514D|
Poisoning by anticoagulants, undetermined, subsequent encounter
T45.514S|
Poisoning by anticoagulants, undetermined, sequela
T45.515|
Adverse effect of anticoagulants
T45.515A|
Adverse effect of anticoagulants, initial encounter
T45.515D|
Adverse effect of anticoagulants, subsequent encounter
T45.515S|
Adverse effect of anticoagulants, sequela
T45.516|
Underdosing of anticoagulants

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