Y37.7Military operations involving chemical weapons and other forms of unconventional warfare

Y37.7 is the ICD-10-CM diagnosis code for military operations involving chemical weapons and other forms of unconventional warfare. It belongs to category Y37 (military operations), block Y35-Y38 (legal intervention, operations of war, military operations, and terrorism) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

Within Y37, choose Y37.7 (involving chemical weapons and other forms of unconventional warfare) only when documentation doesn't support a more specific option: involving explosion of marine weapons (Y37.0), involving destruction of aircraft (Y37.1), involving other explosions and fragments (Y37.2), involving fires, conflagrations and hot substances (Y37.3), involving firearm discharge and other forms of conventional warfare (Y37.4), involving nuclear weapons (Y37.5), involving biological weapons (Y37.6), other and unspecified military operations (Y37.9) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

Don't report Y37.7 together with the conditions in its Excludes1 note: military operations involving incendiary devices (Y36.3-, Y36.5-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.