Y36.491A War operations involving other forms of conventional warfare, civilian, initial encounter

Billable ICD-10-CM code, FY2026.

Built from Y36.491 with 7th character A (initial encounter).

Applies from Y36 Operations of war

Includes

• injuries to military personnel and civilians caused by war, civil insurrection, and peacekeeping missions

Excludes1 (never code together)

• 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)

7th character note

• The appropriate 7th character is to be added to each code from category Y36

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Code annotations containing back-references to Y36.491A

Back-references to Y36.4

• Type 1 Excludes: W32 Accidental handgun discharge and malfunction ("handgun discharge involving military or war operations (Y36.4-)")
• Type 1 Excludes: W33 Accidental rifle, shotgun and larger firearm discharge and malfunction ("firearm discharge involving military or war operations (Y36.4-)")

Back-references to Y36

• Type 1 Excludes: V91 Other injury due to accident to watercraft ("military watercraft accident in military or war operations (Y36, Y37.-)")
• Type 1 Excludes: V92 Drowning and submersion due to accident on board watercraft, without accident to watercraft ("military watercraft accident in military or war operations (Y36, Y37)")
• Type 1 Excludes: V93 Other injury due to accident on board watercraft, without accident to watercraft ("military watercraft accident in military or war operations (Y36, Y37.-)")
• Type 1 Excludes: V94 Other and unspecified water transport accidents ("military watercraft accidents in military or war operations (Y36, Y37)")
• Type 1 Excludes: W49 Exposure to other inanimate mechanical forces ("exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)")
• Type 1 Excludes: Y37 Military operations ("war operations (Y36.-)")

Nearby codes

• Y36.490 War operations involving other forms of conventional warfare, military personnel
• Y36.490A War operations involving other forms of conventional warfare, military personnel, initial encounter
• Y36.490D War operations involving other forms of conventional warfare, military personnel, subsequent encounter
• Y36.490S War operations involving other forms of conventional warfare, military personnel, sequela
• Y36.491 War operations involving other forms of conventional warfare, civilian
• Y36.491A War operations involving other forms of conventional warfare, civilian, initial encounter (this code)
• Y36.491D War operations involving other forms of conventional warfare, civilian, subsequent encounter
• Y36.491S War operations involving other forms of conventional warfare, civilian, sequela
• Y36.5 War operations involving nuclear weapons
• Y36.50 War operations involving unspecified effect of nuclear weapon
• Y36.500 War operations involving unspecified effect of nuclear weapon, military personnel