External causes of morbidity (V00-Y99)

Note:
This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

Legal intervention, operations of war, military operations, and terrorism (Y35-Y38)

Y35 Legal intervention [+]
Includes: any injury sustained as a result of an encounter with any law enforcement official, serving in any capacity at the time of the encounter, whether on-duty or off-duty. Includes: injury to law enforcement official, suspect and bystander
The appropriate 7th character is to be added to each code from category Y35
A - initial encounter
D - subsequent encounter
S - sequela
Y36 Operations of war [+]
Includes: injuries to military personnel and civilians caused by war, civil insurrection, and peacekeeping missions
Excludes 1: injury to military personnel occurring during peacetime military operations (Y37.-)
military vehicles involved in transport accidents with non-military vehicle during peacetime (V09.01, V09.21, V19.81, V29.818, V39.81, V49.81, V59.81, V69.81, V79.81)
The appropriate 7th character is to be added to each code from category Y36
A - initial encounter
D - subsequent encounter
S - sequela
Y37 Military operations [+]
Includes: injuries to military personnel and civilians occurring during peacetime on military property and during routine military exercises and operations
Excludes 1: military aircraft involved in aircraft accident with civilian aircraft (V97.81-)
military vehicles involved in transport accident with civilian vehicle (V09.01, V09.21, V19.81, V29.818, V39.81, V49.81, V59.81, V69.81, V79.81)
military watercraft involved in water transport accident with civilian watercraft (V94.81-)
war operations (Y36.-)
The appropriate 7th character is to be added to each code from category Y37
A - initial encounter
D - subsequent encounter
S - sequela
Y38 Terrorism [+]
These codes are for use to identify injuries resulting from the unlawful use of force or violence against persons or property to intimidate or coerce a Government, the civilian population, or any segment thereof, in furtherance of political or social objective
Use additional code for place of occurrence (Y92.-)
The appropriate 7th character is to be added to each code from category Y38
A - initial encounter
D - subsequent encounter
S - sequela

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