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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T65.843|
Toxic effect of xylazine, assault
T65.843A|
Toxic effect of xylazine, assault, initial encounter
T65.843D|
Toxic effect of xylazine, assault, subsequent encounter
T65.843S|
Toxic effect of xylazine, assault, sequela
T65.844|
Toxic effect of xylazine, undetermined
T65.844A|
Toxic effect of xylazine, undetermined, initial encounter
T65.844D|
Toxic effect of xylazine, undetermined, subsequent encounter
T65.844S|
Toxic effect of xylazine, undetermined, sequela
T65.89|
Toxic effect of other specified substances
T65.891|
Toxic effect of other specified substances, accidental (unintentional)
T65.891A|
Toxic effect of other specified substances, accidental (unintentional), initial encounter
T65.891D|
Toxic effect of other specified substances, accidental (unintentional), subsequent encounter
T65.891S|
Toxic effect of other specified substances, accidental (unintentional), sequela
T65.892|
Toxic effect of other specified substances, intentional self-harm
T65.892A|
Toxic effect of other specified substances, intentional self-harm, initial encounter
T65.892D|
Toxic effect of other specified substances, intentional self-harm, subsequent encounter
T65.892S|
Toxic effect of other specified substances, intentional self-harm, sequela
T65.893|
Toxic effect of other specified substances, assault
T65.893A|
Toxic effect of other specified substances, assault, initial encounter
T65.893D|
Toxic effect of other specified substances, assault, subsequent encounter
T65.893S|
Toxic effect of other specified substances, assault, sequela
T65.894|
Toxic effect of other specified substances, undetermined
T65.894A|
Toxic effect of other specified substances, undetermined, initial encounter
T65.894D|
Toxic effect of other specified substances, undetermined, subsequent encounter
T65.894S|
Toxic effect of other specified substances, undetermined, sequela
T65.9|
Toxic effect of unspecified substance
T65.91|
Toxic effect of unspecified substance, accidental (unintentional)
T65.91XA|
Toxic effect of unspecified substance, accidental (unintentional), initial encounter
T65.91XD|
Toxic effect of unspecified substance, accidental (unintentional), subsequent encounter
T65.91XS|
Toxic effect of unspecified substance, accidental (unintentional), sequela
T65.92|
Toxic effect of unspecified substance, intentional self-harm
T65.92XA|
Toxic effect of unspecified substance, intentional self-harm, initial encounter
T65.92XD|
Toxic effect of unspecified substance, intentional self-harm, subsequent encounter
T65.92XS|
Toxic effect of unspecified substance, intentional self-harm, sequela
T65.93|
Toxic effect of unspecified substance, assault
T65.93XA|
Toxic effect of unspecified substance, assault, initial encounter
T65.93XD|
Toxic effect of unspecified substance, assault, subsequent encounter
T65.93XS|
Toxic effect of unspecified substance, assault, sequela
T65.94|
Toxic effect of unspecified substance, undetermined
T65.94XA|
Toxic effect of unspecified substance, undetermined, initial encounter
T65.94XD|
Toxic effect of unspecified substance, undetermined, subsequent encounter
T65.94XS|
Toxic effect of unspecified substance, undetermined, sequela
T66|
Radiation sickness, unspecified
T66.XXXA|
Radiation sickness, unspecified, initial encounter
T66.XXXD|
Radiation sickness, unspecified, subsequent encounter
T66.XXXS|
Radiation sickness, unspecified, sequela
T67|
Effects of heat and light
T67.0|
Heatstroke and sunstroke
T67.01|
Heatstroke and sunstroke
T67.01XA|
Heatstroke and sunstroke, initial encounter

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