W40.8
Explosion of other specified explosive materials
W40.8 is a non-billable ICD-10-CM code header for explosion of other specified explosive materials. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. A 7th character is required to complete the code. Its coding notes include 10 Excludes1 entries.
7th character
Category W40 requires a 7th character. W40.8 has only 4 characters, so a placeholder X fills the empty positions.
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.
Inclusion terms
Conditions classified to this code.
- Explosion in dump NOS
- Explosion in factory NOS
- Explosion in grain store
- Explosion in munitions
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.