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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T55.1X2S|
Toxic effect of detergents, intentional self-harm, sequela
T55.1X3|
Toxic effect of detergents, assault
T55.1X3A|
Toxic effect of detergents, assault, initial encounter
T55.1X3D|
Toxic effect of detergents, assault, subsequent encounter
T55.1X3S|
Toxic effect of detergents, assault, sequela
T55.1X4|
Toxic effect of detergents, undetermined
T55.1X4A|
Toxic effect of detergents, undetermined, initial encounter
T55.1X4D|
Toxic effect of detergents, undetermined, subsequent encounter
T55.1X4S|
Toxic effect of detergents, undetermined, sequela
T56|
Toxic effect of metals
T56.0|
Toxic effects of lead and its compounds
T56.0X|
Toxic effects of lead and its compounds
T56.0X1|
Toxic effect of lead and its compounds, accidental (unintentional)
T56.0X1A|
Toxic effect of lead and its compounds, accidental (unintentional), initial encounter
T56.0X1D|
Toxic effect of lead and its compounds, accidental (unintentional), subsequent encounter
T56.0X1S|
Toxic effect of lead and its compounds, accidental (unintentional), sequela
T56.0X2|
Toxic effect of lead and its compounds, intentional self-harm
T56.0X2A|
Toxic effect of lead and its compounds, intentional self-harm, initial encounter
T56.0X2D|
Toxic effect of lead and its compounds, intentional self-harm, subsequent encounter
T56.0X2S|
Toxic effect of lead and its compounds, intentional self-harm, sequela
T56.0X3|
Toxic effect of lead and its compounds, assault
T56.0X3A|
Toxic effect of lead and its compounds, assault, initial encounter
T56.0X3D|
Toxic effect of lead and its compounds, assault, subsequent encounter
T56.0X3S|
Toxic effect of lead and its compounds, assault, sequela
T56.0X4|
Toxic effect of lead and its compounds, undetermined
T56.0X4A|
Toxic effect of lead and its compounds, undetermined, initial encounter
T56.0X4D|
Toxic effect of lead and its compounds, undetermined, subsequent encounter
T56.0X4S|
Toxic effect of lead and its compounds, undetermined, sequela
T56.1|
Toxic effects of mercury and its compounds
T56.1X|
Toxic effects of mercury and its compounds
T56.1X1|
Toxic effect of mercury and its compounds, accidental (unintentional)
T56.1X1A|
Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter
T56.1X1D|
Toxic effect of mercury and its compounds, accidental (unintentional), subsequent encounter
T56.1X1S|
Toxic effect of mercury and its compounds, accidental (unintentional), sequela
T56.1X2|
Toxic effect of mercury and its compounds, intentional self-harm
T56.1X2A|
Toxic effect of mercury and its compounds, intentional self-harm, initial encounter
T56.1X2D|
Toxic effect of mercury and its compounds, intentional self-harm, subsequent encounter
T56.1X2S|
Toxic effect of mercury and its compounds, intentional self-harm, sequela
T56.1X3|
Toxic effect of mercury and its compounds, assault
T56.1X3A|
Toxic effect of mercury and its compounds, assault, initial encounter
T56.1X3D|
Toxic effect of mercury and its compounds, assault, subsequent encounter
T56.1X3S|
Toxic effect of mercury and its compounds, assault, sequela
T56.1X4|
Toxic effect of mercury and its compounds, undetermined
T56.1X4A|
Toxic effect of mercury and its compounds, undetermined, initial encounter
T56.1X4D|
Toxic effect of mercury and its compounds, undetermined, subsequent encounter
T56.1X4S|
Toxic effect of mercury and its compounds, undetermined, sequela
T56.2|
Toxic effects of chromium and its compounds
T56.2X|
Toxic effects of chromium and its compounds
T56.2X1|
Toxic effect of chromium and its compounds, accidental (unintentional)
T56.2X1A|
Toxic effect of chromium and its compounds, accidental (unintentional), initial encounter

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