W40.0 – Explosion of blasting material

ICD-10-CM 2027 diagnosis code · Exposure to inanimate mechanical forces

Non-billable header

ICD-10-CM code W40.0

Code: W40.0 (claims format: W400)
Description: Explosion of blasting material
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: W20-W49 Exposure to inanimate mechanical forces
Parent codes: W40

Billable codes under W40.0

W40.0 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes for W40.0

Applicable to:

Explosion of blasting cap
Explosion of detonator
Explosion of dynamite
Explosion of explosive (any) used in blasting operations

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

W40 – Explosion of other materials

Excludes1 (not coded here):

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

Block W20-W49

Excludes1 (not coded here):

assault (X92-Y09)
contact or collision with animals or persons (W50-W64)
exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
intentional self-harm (X71-X83)

Related codes in W40

Frequently asked questions

What is ICD-10 code W40.0?

W40.0 is the ICD-10-CM code for explosion of blasting material, in the block W20-W49 (Exposure to inanimate mechanical forces).

Is W40.0 a billable code?

No. W40.0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does W40.0 belong to?

It belongs to category W40 – Explosion of other materials.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.