Y37.331A
Military operations involving flamethrower, civilian, initial encounter
Y37.331A (also written Y37331A) is a billable ICD-10-CM diagnosis code for military operations involving flamethrower, civilian, initial encounter. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 273 codes in category Y37 (Military operations). Its 7th character, A, means initial encounter. Its coding notes include 8 Excludes1 entries.
7th character
Category Y37 requires a 7th character.
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.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
- military operations involving fires and conflagrations aboard military aircraft (Y37.1-)
- military operations involving fires and conflagrations aboard military watercraft (Y37.0-)
- military operations involving fires and conflagrations caused indirectly by conventional weapons (Y37.2-)
- military operations involving fires and thermal effects of nuclear weapons (Y36.53-)
- 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.-)
Includes
Further defines or gives examples of the content of the category.
- 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)
- 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.