DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Y31 Falling, lying or running before or into moving object, undetermined intent

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

Y31 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. Y21-Y33 Event of undetermined intent (Y21-Y33)
  3. Y31 Falling, lying or running before or into moving object, undetermined intent
Billable codes
3
Subdivisions
0
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in Y31

  1. Y31.XXXA
    Falling, lying or running before or into moving object, undetermined intent, initial encounter
    Billable
  2. Y31.XXXD
    Falling, lying or running before or into moving object, undetermined intent, subsequent encounter
    Billable
  3. Y31.XXXS
    Falling, lying or running before or into moving object, undetermined intent, 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

Notes that also apply

Block Y21-Y33 instructions (Inclusion terms 1): printed on the block page.

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

7th characters

7th characters for Y31 defined here

The appropriate 7th character is to be added to code Y31

7th characters for Y31
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