DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

W51 Accidental striking against or bumped into by another person

  • Header · not billable
  • Codes take a 7th character

W51 is not billable. The category heads 3 billable codes in FY2027. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Where it sits

  1. Chapter 20 External causes of morbidity (V00-Y99)
  2. W50-W64 Exposure to animate mechanical forces (W50-W64)
  3. W51 Accidental striking against or bumped into by another person
Billable codes
3
Subdivisions
0
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in W51

  1. W51.XXXA
    Accidental striking against or bumped into by another person, initial encounter
    Billable
  2. W51.XXXD
    Accidental striking against or bumped into by another person, subsequent encounter
    Billable
  3. W51.XXXS
    Accidental striking against or bumped into by another person, sequela
    Billable

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At W51

Excludes1

  • assault by striking against or bumping into by another person (Y04.2) Y04.2
  • fall due to collision with another person (W03) W03

Notes that also apply

Block W50-W64 instructions (Excludes1 1): printed on the block page.

Chapter 20 instructions (Notes 1): printed on the chapter 20 page.

7th characters

7th characters for W51 defined here

The appropriate 7th character is to be added to code W51

7th characters for W51
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Hierarchy