Y36.ABlast overpressure in war operations

Y36.A is the ICD-10-CM diagnosis code for blast overpressure in war operations. It belongs to category Y36 (operations of war), 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 2 subcodes must be used instead.

Within Y36 (operations of war), Y36.A is specifically for blast overpressure in war operations. Related codes cover war operations involving explosion of marine weapons (Y36.0), war operations involving destruction of aircraft (Y36.1), war operations involving other explosions and fragments (Y36.2), war operations involving fires, conflagrations and hot substances (Y36.3), war operations involving firearm discharge and other forms of conventional warfare (Y36.4), war operations involving nuclear weapons (Y36.5), war operations involving biological weapons (Y36.6), war operations involving chemical weapons and other forms of unconventional warfare (Y36.7) and 2 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.

It was added in FY2026, effective October 1, 2025.