ICD-10-CM 2027 diagnosis code
Y31.XXXAFalling, lying or running before or into moving object, undetermined intent, initial encounter
Y31.XXXA is a valid, billable ICD-10-CM code for falling, lying or running before or into moving object, undetermined intent, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Fall/lying/running bef/into moving obj, undet intent, init
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.XXXA
Y31.XXXA is the ICD-10-CM diagnosis code for falling, lying or running before or into moving object, undetermined intent, initial encounter. It belongs to category Y31 (falling, lying or running before or into moving object, undetermined intent), block Y21-Y33 (event of undetermined intent) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
The 7th character "A" means initial encounter: use it while the patient is receiving active treatment for the condition.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as E988.0 (injury by jumping or lying before moving object, undetermined whether accidentally or purposely inflicted).
7th character
Ainitial encounter
Other encounter types for Y31:
Notes that apply from higher levels
Instructions written at a parent level also apply to Y31.XXXA.
Broader instructions also apply from Y21-Y33 Event of undetermined intent and Chapter 20: External causes of morbidity.
ICD-9-CM equivalent
Converter →- E988.0Injury by jumping or lying before moving object, undetermined whether accidentally or purposely inflictedapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Y31.XXXA
Is Y31.XXXA billable?
- Yes. Y31.XXXA is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
What does the "A" at the end of Y31.XXXA mean?
- It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.
Can Y31.XXXA be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Y31.XXXA as a principal diagnosis.
Is Y31.XXXA a CC or MCC?
- No. Y31.XXXA is neither a CC nor an MCC under MS-DRG v44.0.
What is the ICD-9 code for Y31.XXXA?
- The CMS General Equivalence Mappings map Y31.XXXA to ICD-9-CM E988.0.