ICD-10-CM 2027 diagnosis code

Y31Falling, lying or running before or into moving object, undetermined intent

Not billable — use a more specific code

Y31 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Fall/lying/running bef/into moving object, undet intent

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y31

Y31 is the ICD-10-CM diagnosis code for falling, lying or running before or into moving object, undetermined intent. It belongs to block Y21-Y33 (event of undetermined intent) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Y31.XXXA (initial encounter), Y31.XXXD (subsequent encounter) and Y31.XXXS (sequela).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Y31

Notes that apply from higher levels

Instructions written at a parent level also apply to Y31.

Broader instructions also apply from Y21-Y33 Event of undetermined intent and Chapter 20: External causes of morbidity.

Alphabetic index entries

5 entries

Terms in the official ICD-10-CM index that lead to Y31.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about Y31

Is Y31 billable?: No. Y31 is a header code. Report one of its more specific subcodes instead.