ICD-10-CM 2027 diagnosis code
Y37.5Military operations involving nuclear weapons
Y37.5 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it and add the required 7th character.
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 Y37.5
Y37.5 is the ICD-10-CM diagnosis code for military operations involving nuclear weapons. 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 6 subcodes must be used instead.
Within Y37 (military operations), Y37.5 is specifically for military operations involving nuclear weapons. Related codes cover 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 biological weapons (Y37.6), involving chemical weapons and other forms of unconventional warfare (Y37.7), 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.
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
- Y37.50Military operations involving unspecified effect of nuclear weapon
- Y37.51Military operations involving direct blast effect of nuclear weapon
- Y37.52Military operations involving indirect blast effect of nuclear weapon
- Y37.53Military operations involving thermal radiation effect of nuclear weapon
- Y37.54Military operation involving nuclear radiation effects of nuclear weapon
- Y37.59Military operation involving other effects of nuclear weapons
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
Coding notes
- Military operation involving dirty bomb NOS
Notes that apply from higher levels
Instructions written at a parent level also apply to Y37.5.
› 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.
Codes whose notes reference Y37.5
- Y37.2Excludes1
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 Y37.5
Is Y37.5 billable?
- No. Y37.5 is a header code. Report one of its more specific subcodes instead.