Y38.7
Terrorism involving chemical weapons
Y38.7 is a non-billable ICD-10-CM code header for terrorism involving chemical weapons. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific code under it is Y38.7X Terrorism involving chemical weapons. Its coding notes include a Use additional code instruction.
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.
Suspected terrorism is classified as assault, not Y38. Y38.9 is for conditions occurring after the event, not the initial act.
Use additional code
Add the listed code as a secondary code, if known.
Inclusion terms
Conditions classified to this code.
- Terrorism involving gases, fumes, chemicals
- Terrorism involving hydrogen cyanide
- Terrorism involving phosgene
- Terrorism involving sarin
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.