Y37Military operations

Y37 is the ICD-10-CM diagnosis code for military operations. It belongs to 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 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Y37.0 (involving explosion of marine weapons), Y37.1 (involving destruction of aircraft), Y37.2 (involving other explosions and fragments), Y37.3 (involving fires, conflagrations and hot substances), Y37.4 (involving firearm discharge and other forms of conventional warfare), Y37.5 (involving nuclear weapons), Y37.6 (involving biological weapons), Y37.7 (involving chemical weapons and other forms of unconventional warfare) and 2 more.

Don't report Y37 together with the conditions in its Excludes1 note: 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-) and war operations (Y36.-).

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