2021 ICD-10-CM Diagnosis Code Y31

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

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • Y31 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Fall/lying/running bef/into moving object, undet intent
  • The 2021 edition of ICD-10-CM Y31 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of Y31 - other international versions of ICD-10 Y31 may differ.
ICD-10-CM Coding Rules
  • Y31 describes the circumstance causing an injury, not the nature of the injury.
The following code(s) above Y31 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Y31:
  • V00-Y99
    2021 ICD-10-CM Range V00-Y99

    External causes of morbidity

    Note
    • 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.
    External causes of morbidity
  • Y21-Y33
    2021 ICD-10-CM Range Y21-Y33

    Event of undetermined intent

    Applicable To
    • 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)
    Event of undetermined intent
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

External Cause Index entries containing back-references to Y31:
  • Jumped, jumping
    • before moving object NEC X81.8
      ICD-10-CM Diagnosis Code X81.8

      Intentional self-harm by jumping or lying in front of other moving object

        2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
      • undetermined whether accidental or intentional Y31
  • Lying before train, vehicle or other moving object X81.8
    ICD-10-CM Diagnosis Code X81.8

    Intentional self-harm by jumping or lying in front of other moving object

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    • undetermined whether accidental or intentional Y31
  • Undetermined intent (contact) (exposure)
    • falling, lying or running before moving object Y31
    • lying, falling or running before moving object Y31
    • running, falling or lying before moving object Y31

ICD-10-CM Codes Adjacent To Y31
Y28.9XXD …… subsequent encounter
Y28.9XXS …… sequela
Y29 Contact with blunt object, undetermined intent
Y29.XXXA Contact with blunt object, undetermined intent, initial encounter
Y29.XXXD Contact with blunt object, undetermined intent, subsequent encounter
Y29.XXXS Contact with blunt object, undetermined intent, sequela
Y30 Falling, jumping or pushed from a high place, undetermined intent
Y30.XXXA Falling, jumping or pushed from a high place, undetermined intent, initial encounter
Y30.XXXD Falling, jumping or pushed from a high place, undetermined intent, subsequent encounter
Y30.XXXS Falling, jumping or pushed from a high place, undetermined intent, sequela
Y31 Falling, lying or running before or into moving object, undetermined intent
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
Y32 Crashing of motor vehicle, undetermined intent
Y32.XXXA Crashing of motor vehicle, undetermined intent, initial encounter
Y32.XXXD Crashing of motor vehicle, undetermined intent, subsequent encounter
Y32.XXXS Crashing of motor vehicle, undetermined intent, sequela
Y33 Other specified events, undetermined intent
Y33.XXXA Other specified events, undetermined intent, initial encounter
Y33.XXXD Other specified events, undetermined intent, subsequent encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.