DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

W50 Accidental hit, strike, kick, twist, bite or scratch by another person

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

W50 is not billable. The category heads 15 billable codes in FY2027, grouped under 5 subdivisions. 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. W50 Accidental hit, strike, kick, twist, bite or scratch by another person
Billable codes
15
Subdivisions
5
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in W50

  1. W50.0
    Accidental hit or strike by another person +7th: A D S
    Needs 7th character
    Inclusion terms 1

    Inclusion terms

    • Hit or strike by another person NOS
  2. W50.1
    Accidental kick by another person +7th: A D S
    Needs 7th character
    Inclusion terms 1

    Inclusion terms

    • Kick by another person NOS
  3. W50.2
    Accidental twist by another person +7th: A D S
    Needs 7th character
    Inclusion terms 1

    Inclusion terms

    • Twist by another person NOS
  4. W50.3
    Accidental bite by another person +7th: A D S
    Needs 7th character
    Inclusion terms 2

    Inclusion terms

    • Human bite
    • Bite by another person NOS
  5. W50.4
    Accidental scratch by another person +7th: A D S
    Needs 7th character
    Inclusion terms 1

    Inclusion terms

    • Scratch by another person NOS

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 W50

Includes

  • hit, strike, kick, twist, bite, or scratch by another person NOS

Excludes1

  • assault by bodily force (Y04) Y04
  • struck by objects (W20-W22) W20 W22

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 W50 defined here

The appropriate 7th character is to be added to each code from category W50

7th characters for W50
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