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  5. Assault by bodily force (Y04)

Assault by bodily force (Y04)

The ICD-10 code Y04 covers injuries resulting from assault by bodily force. This section is used to specify causes of injury where physical force by another person leads to harm, divided into detailed categories such as unarmed fights, human bites, and other bodily force interactions.

These codes guide medical coders in documenting the nature of assaults including Y04.0 for unarmed brawls or fights (often described as punches, slaps, or kicks), Y04.1 for assaults by human bites, and Y04.2 for being struck or bumped by another person. The category Y04.8 captures other bodily force attacks like hair pulling or being grabbed and twisted. Each of these codes can be further specified by encounter type such as initial (Y04.XxXA), subsequent (Y04.XxXD), or sequela (Y04.XxXS) to reflect the treatment phase. These distinctions help ensure precise coding for injuries caused by physical aggression, referred to in common terms like "fight assault" or "assault by human bite," supporting accurate reporting and appropriate care documentation. Using the ICD-10 code for assault by bodily force assists healthcare professionals in correctly describing injury causes in medical records and billing.

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.

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 Y04

7th Character

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

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