ICD-10-CM › V00-Y99 › Y21-Y33 › Y codes › Y31

Y31

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

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 3 more specific codes instead:

  • Y31.XXXA Falling, lying or running before or into moving object, undetermined intent, initial encounter
  • Y31.XXXD Falling, lying or running before or into moving object, undetermined intent, subsequent encounter
  • Y31.XXXS Falling, lying or running before or into moving object, undetermined intent, sequela

This code requires a seventh character. See the rule below.

What has happened to this code

Every change the publisher made, from 2014 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2014 Added to the draft code set draft Falling, lying or running before or into moving object, undetermined intent

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Seventh character required

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

Inherited from the Y21-Y33 section Event of undetermined intent (Y21-Y33)

Also known as

  • Undetermined intent is only for use when there is specific documentation in the record that the intent of the injury cannot be determined. If no such documentation is present, code to accidental (unintentional)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.