Accidental striking against or bumped into by another person (W51)
W51 codes capture incidents where someone is accidentally struck or bumped into by another person, covering initial injuries, later encounters, and resulting complications.
The ICD-10 code for accidental striking against or bumped into by another person, W51, is used to document external causes of injury in events like accidental collisions during sports or being unintentionally knocked down. This includes situations described by synonyms such as "accidentally knocked down while boxing," "injury in accidental collision between swimmers," or simply "bumped into other person." Specific codes like W51.XXXA indicate the initial encounter for treatment, W51.XXXD represents subsequent encounters, and W51.XXXS is used for sequelae, or complications resulting from the original incident. These distinctions help healthcare providers and coders accurately track injury progression and management over time.
External causes of morbidity and mortality (V01–Y99)
Exposure to animate mechanical forces (W50-W64)
W51 Accidental striking against or bumped into by another person
- W51.XXXA Accidental striking against or bumped into by another person, initial encounter
- W51.XXXD Accidental striking against or bumped into by another person, subsequent encounter
- W51.XXXS Accidental striking against or bumped into by another person, sequela
Accidental striking against or bumped into by another person (W51)
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 striking against or bumping into by another person Y04.2
- fall due to collision with another person W03
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 code W51
7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.
- A - initial encounter
- D - subsequent encounter
- S - sequela
