2026 ICD-10-CM Diagnosis Code W40Explosion of other materials
W40 is a non-billable ICD-10-CM category code for explosion of other materials, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W40.0XXA, W40.0XXD, W40.0XXS, and W40.1XXA.
Code Identity
Code Classification
Specific Coding for Explosion of other materialsOverview
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- assault by explosive material X96
- explosion involving legal intervention Y35.1
- explosion involving military or war operations Y36.0 Y36.2
- intentional self-harm by explosive material X75
7th Character Note
- The appropriate 7th character is to be added to each code from category W40
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Code HistoryHistory
Questions About W40Overview
Is W40 (Explosion of other materials) a billable code?
No. This is a category header that groups the codes for explosion of other materials, and headers cannot be submitted on claims. Claims for explosion of other materials need a more specific code from this category, such as W40.0XXA, W40.0XXD, and W40.0XXS.
