Alphabetic Index FY2027

Y37

Military operations

FY2027Chapter 20: External causes of morbidity/Y35–Y38 Legal intervention, operations of war, military operations, and terrorism

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

Y37 is a non-billable ICD-10-CM code category for military operations. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are Y37.0 Military operations involving explosion of marine weapons; Y37.1 Military operations involving destruction of aircraft; Y37.2 Military operations involving other explosions and fragments; Y37.3 Military operations involving fires, conflagrations and hot substances and 6 more. Its coding notes include 4 Excludes1 entries.

7th characters

Every code below needs one of these.

The appropriate 7th character is to be added to each code from category Y37

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

An external cause code is never a principal or first-listed diagnosis. Its 7th character is assigned for each encounter and should match the injury or condition code.

Guidelines I.C.20.a.2; I.C.20.a.6External cause codesRead the official text

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

Includes

Further defines or gives examples of the content of the category.

This code
  • injuries to military personnel and civilians occurring during peacetime on military property and during routine military exercises and operations

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 20 External causes of morbidity
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

More specific codes under Y37 10