ICD-10-CM 2027 diagnosis code

Y36.7XWar operations involving chemical weapons and other forms of unconventional warfare

Not billable — use a more specific codeRequires 7th character

Y36.7X is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it and add the required 7th character.Short description: War op involving chemical weapons and oth unconvtl warfare

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y36.7X

Y36.7X is the ICD-10-CM diagnosis code for war operations involving chemical weapons and other forms of unconventional warfare. 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.

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

7th character

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

Ainitial encounter
Dsubsequent encounter
Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to Y36.7X.

› From Y36.7 War operations involving chemical weapons and other forms of unconventional warfare

Excludes1

war operations involving incendiary devices (Y36.3-, Y36.5-)

› From Y36 Operations of war

Includes

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

Excludes1

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)

Broader instructions also apply from Chapter 20: External causes of morbidity.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to Y36.7X.

War operations (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving) › chemical weapons
War operations (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving) › unconventional warfare NEC
War operations (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving) › warfare › unconventional NEC
War operations (injuries to military personnel and civilians during war, civil insurrection and peacekeeping missions) (by) (from) (involving) › weapons › chemical

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about Y36.7X

Is Y36.7X billable?: No. Y36.7X is a header code. Report one of its more specific subcodes instead.