ICD-10-CM 2027 diagnosis code
Y37.7XMilitary operations involving chemical weapons and other forms of unconventional warfare
Y37.7X 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: Milt 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 Y37.7X
Y37.7X 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 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 Y37
- Y37.7X0Military operations involving chemical weapons and other forms of unconventional warfare, military personnel
- Y37.7X1Military operations involving chemical weapons and other forms of unconventional warfare, civilian
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Notes that apply from higher levels
Instructions written at a parent level also apply to Y37.7X.
› From Y37.7 Military operations involving chemical weapons and other forms of unconventional warfare
› From Y37 Military operations
- injuries to military personnel and civilians occurring during peacetime on military property and during routine military exercises and operations
- 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-)
- war operations (Y36.-)
Broader instructions also apply from Chapter 20: External causes of morbidity.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to Y37.7X.
- Military operations (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving) › chemical weapons
- Military operations (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving) › unconventional warfare NEC
- Military operations (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (by) (from) (involving) › warfare › unconventional NEC
- Military operations (injuries to military and civilians occuring during peacetime on military property and during routine military exercises and operations) (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 Y37.7X
Is Y37.7X billable?
- No. Y37.7X is a header code. Report one of its more specific subcodes instead.