2027 ICD-10-CM Diagnosis Code Y31Falling, lying or running before or into moving object, undetermined intent

ICD-10-CM Codes›V01–Y99›Y21-Y33›Y31

ICD-10-CM Y31
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Y31 is a non-billable ICD-10-CM category code for falling, lying or running before or into moving object, undetermined intent, so it cannot be submitted on claims. Use a more specific code from this category instead, such as Y31.XXXA, Y31.XXXD, and Y31.XXXS.

Code Identity

ICD-10-CM Code
Y31
Billable Status
No — Non-Billable Category
Code Describes
Falling, lying or running before or into moving object, undetermined intent
Short Description
Fall/lying/running bef/into moving object, undet intent
Chapter
Y21-Y33
Event of undetermined intent

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionY21-Y33Event of undetermined intent
CategoryY31Falling, lying or running before or into moving object, undetermined intent
This CodeY31Falling, lying or running before or into moving object, undetermined intent

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Y31: its own notes plus those printed at Chapter 20. A note printed at a category, block or chapter applies to every code under it.

Notes

General instructions on how these codes are used.

From Chapter 20 (V00-Y99) External causes of morbidity and mortality applies to 7,461 codes
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to code Y31
Values for category Y31 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index; each main term links to its index entry.

Patient EducationClinical

Falls

Falls can be dangerous at any age. Babies and young children can get hurt falling off furniture or down the stairs. Older children may fall off playground equipment. For older adults, falls can be especially serious. They are at higher risk of falling.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Y31Overview

Is Y31 a billable code?

No. This is a category header that groups the codes for falling, lying or running before or into moving object, undetermined intent, and headers cannot be submitted on claims. Claims for falling, lying or running before or into moving object, undetermined intent need a more specific code from this category, such as Y31.XXXA, Y31.XXXD, and Y31.XXXS.