W40.9

W40.9: Explosion of unspecified explosive materials

Non-billable headerICD-10-CM

W40.9 is a non-billable header ICD-10-CM code for explosion of unspecified explosive materials. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category W40

A: initial encounter
D: subsequent encounter
S: sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Explosion NOS

Excludes1 inherited from the categories above W40.9

A category’s note binds every code beneath it.

Written on W40: Explosion of other materials

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)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

Explosion(accidental) (of) (with secondary fire)
Explosion›explosive(material)
Explosion›stove
Poisoning›fumes or smoke due to›explosion

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead W40.9

3 child codes. Green means billable.