Alphabetic Index FY2027

Y38.3X

Terrorism involving fires, conflagration and hot substances

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.

Y38.3X is a non-billable ICD-10-CM code header for terrorism involving fires, conflagration and hot substances. 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 Y38.3X1 Terrorism involving fires, conflagration and hot substances, public safety official injured; Y38.3X2 Terrorism involving fires, conflagration and hot substances, civilian injured and Y38.3X3 Terrorism involving fires, conflagration and hot substances, terrorist injured. Its coding notes include a Use additional code instruction and 1 Excludes1 entry.

7th characters

Every code below needs one of these (defined at Y38).

The appropriate 7th character is to be added to each code from category Y38

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Guidelines tips

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

Suspected terrorism is classified as assault, not Y38. Y38.9 is for conditions occurring after the event, not the initial act.

Guidelines I.C.20.jTerrorismRead the official text

Use additional code

Add the listed code as a secondary code, if known.

Inherited from Y38 Terrorism
  • code for place of occurrence (Y92.-)

Excludes1

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

Inherited from Y38.3 Terrorism involving fires, conflagration and hot substances
  • terrorism involving fire or heat of nuclear weapon (Y38.5)

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 Y38.3X 3