2026 ICD-10-CM Diagnosis Code W51Accidental striking against or bumped into by another person
W51 is a non-billable ICD-10-CM category code for accidental striking against or bumped into by another person, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W51.XXXA, W51.XXXD, and W51.XXXS.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- assault by striking against or bumping into by another person Y04.2
- fall due to collision with another person W03
7th Character Note
- The appropriate 7th character is to be added to code W51
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
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.
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.
Indicates that a seventh character is to be assigned to codes in a subcategory.
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index; each main term links to its index entry.
Code HistoryHistory
Questions About W51Overview
What is the ICD-10 code for accidental striking against or bumped into by another person?
W51 is the ICD-10-CM category for accidental striking against or bumped into by another person, but it is a non-billable header: claims need a more specific code from this category, listed on this page.
Is W51 (Accidental striking against or bumped into by another person) a billable code?
No. This is a category header that groups the codes for accidental striking against or bumped into by another person, and headers cannot be submitted on claims. Claims for accidental striking against or bumped into by another person need a more specific code from this category, such as W51.XXXA, W51.XXXD, and W51.XXXS.
