ICD-10-CM 2027 diagnosis code
W40.8Explosion of other specified explosive materials
W40.8 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About W40.8
W40.8 is the ICD-10-CM diagnosis code for explosion of other specified explosive materials. It belongs to category W40 (explosion of other materials), block W20-W49 (exposure to inanimate mechanical forces) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
Within W40, choose W40.8 (other specified explosive materials) only when documentation doesn't support a more specific option: blasting material (W40.0), explosive gases (W40.1) and unspecified explosive materials (W40.9).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
Don't report W40.8 together with the conditions in its Excludes1 note: explosion involving legal intervention (Y35.1-) and explosion involving military or war operations (Y36.0-, Y36.2-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category W40
Coding notes
- Explosion in dump NOS
- Explosion in factory NOS
- Explosion in grain store
- Explosion in munitions
Notes that apply from higher levels
Instructions written at a parent level also apply to W40.8.
Broader instructions also apply from W20-W49 Exposure to inanimate mechanical forces and Chapter 20: External causes of morbidity.
Alphabetic index entries
16 entriesTerms in the official ICD-10-CM index that lead to W40.8.
- Explosion (accidental) (of) (with secondary fire) › antipersonnel bomb
- Explosion (accidental) (of) (with secondary fire) › dump (munitions)
- Explosion (accidental) (of) (with secondary fire) › explosive (material) › specified NEC
- Explosion (accidental) (of) (with secondary fire) › factory (munitions)
- Explosion (accidental) (of) (with secondary fire) › fertilizer bomb
- Explosion (accidental) (of) (with secondary fire) › gasoline (fumes) (tank) not in moving motor vehicle › bomb
- Explosion (accidental) (of) (with secondary fire) › grain store
- Explosion (accidental) (of) (with secondary fire) › grenade
- Explosion (accidental) (of) (with secondary fire) › in, on › dump
- Explosion (accidental) (of) (with secondary fire) › in, on › factory
- Explosion (accidental) (of) (with secondary fire) › letter bomb
- Explosion (accidental) (of) (with secondary fire) › missile NEC
- Explosion (accidental) (of) (with secondary fire) › mortar bomb
- Explosion (accidental) (of) (with secondary fire) › munitions (dump) (factory)
- Explosion (accidental) (of) (with secondary fire) › pipe, pressurized › bomb
- Explosion (accidental) (of) (with secondary fire) › shell (artillery) NEC
Codes whose notes reference W40.8
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about W40.8
Is W40.8 billable?
- No. W40.8 is a header code. Report one of its more specific subcodes instead.