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  5. Explosion of other materials (W40)

Explosion of other materials (W40)

The ICD-10 code section W40 covers injuries resulting from explosions of various materials, categorized by the type of explosive involved. It includes detailed codes for the initial encounter, subsequent encounters, and sequelae, aiding precise documentation of different explosion injury scenarios.

This code section addresses three main types of explosions: blasting material (W40.0), which includes injuries from detonators, dynamite, and demolition charges; explosive gases (W40.1), such as acetylene, propane, or gasoline fumes explosions; and other specified explosive materials (W40.8), covering bombs, grenades, shells, and other munitions-related blasts. Additionally, W40.9 refers to explosions caused by unspecified explosive materials, including accidents and conflagrations in various settings like homes, factories, or public buildings. Each subcode further specifies if it is an initial encounter, subsequent care, or conditions resulting from prior injuries (sequela). Understanding these synonyms and classifications helps medical coders accurately assign the correct ICD-10 code for explosion injuries depending on the material and stage of care, ensuring proper tracking and treatment documentation.

Instructional Notations

Type 1 Excludes

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.

  • 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

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.

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

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela