Y36.521A War operations involving indirect blast effect of nuclear weapon, civilian, initial encounter

Billable ICD-10-CM code, FY2026.

Built from Y36.521 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

Applies from Y36.5 War operations involving nuclear weapons

Applicable to

• War operations involving dirty bomb NOS

Applies from Y36.52 War operations involving indirect blast effect of nuclear weapon

Applicable to

• War operations involving being thrown by blast of nuclear weapon
• War operations involving being struck or crushed by blast debris of nuclear weapon

Code annotations containing back-references to Y36.521A

Back-references to Y36.5

• Type 1 Excludes: Y36.2 War operations involving other explosions and fragments ("war operations involving explosion of nuclear weapons (Y36.5-)")
• Type 1 Excludes: Y36.7 War operations involving chemical weapons and other forms of unconventional warfare ("war operations involving incendiary devices (Y36.3-, Y36.5-)")
• Type 1 Excludes: Y37.7 Military operations involving chemical weapons and other forms of unconventional warfare ("military operations involving incendiary devices (Y36.3-, Y36.5-)")

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

• Y36.520 War operations involving indirect blast effect of nuclear weapon, military personnel
• Y36.520A War operations involving indirect blast effect of nuclear weapon, military personnel, initial encounter
• Y36.520D War operations involving indirect blast effect of nuclear weapon, military personnel, subsequent encounter
• Y36.520S War operations involving indirect blast effect of nuclear weapon, military personnel, sequela
• Y36.521 War operations involving indirect blast effect of nuclear weapon, civilian
• Y36.521A War operations involving indirect blast effect of nuclear weapon, civilian, initial encounter (this code)
• Y36.521D War operations involving indirect blast effect of nuclear weapon, civilian, subsequent encounter
• Y36.521S War operations involving indirect blast effect of nuclear weapon, civilian, sequela
• Y36.53 War operations involving thermal radiation effect of nuclear weapon
• Y36.530 War operations involving thermal radiation effect of nuclear weapon, military personnel
• Y36.530A War operations involving thermal radiation effect of nuclear weapon, military personnel, initial encounter