2019 ICD-10-CM Diagnosis Code W21

Striking against or struck by sports equipment

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • W21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM W21 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of W21 - other international versions of ICD-10 W21 may differ.
ICD-10-CM Coding Rules
  • W21 describes the circumstance causing an injury, not the nature of the injury.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as W21. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • assault with sports equipment (
    ICD-10-CM Diagnosis Code Y08.0

    Assault by strike by sport equipment

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Y08.0-
    )
  • striking against or struck by sports equipment with subsequent fall (
    ICD-10-CM Diagnosis Code W18.01

    Striking against sports equipment with subsequent fall

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    W18.01
    )
The following code(s) above W21 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 W21:
  • V00-Y99
    2019 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
  • W20-W49
    2019 ICD-10-CM Range W20-W49

    Exposure to inanimate mechanical forces

    Type 1 Excludes
    • assault (X92-Y09)
    • contact or collision with animals or persons (W50-W64)
    • exposure to inanimate mechanical forces involving military or war operations (Y36.-, Y37.-)
    • intentional self-harm (X71-X83)
    Exposure to inanimate mechanical forces
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
Code annotations containing back-references to W21:
  • Type 1 Excludes: W20
    , W20.8
    ICD-10-CM Diagnosis Code W20

    Struck by thrown, projected or falling object

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Code First
    Type 1 Excludes
    • falling object in machinery accident (W24, W28-W31)
    • falling object in transport accident (V01-V99)
    • object set in motion by explosion (W35-W40)
    • object set in motion by firearm (W32-W34)
    • struck by thrown sports equipment (W21.-)
    ICD-10-CM Diagnosis Code W20.8

    Other cause of strike by thrown, projected or falling object

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • struck by thrown sports equipment (W21.-)
ICD-10-CM Codes Adjacent To W21
W20.0XXD …… subsequent encounter
W20.0XXS …… sequela
W20.1 Struck by object due to collapse of building
W20.1XXA …… initial encounter
W20.1XXD …… subsequent encounter
W20.1XXS …… sequela
W20.8 Other cause of strike by thrown, projected or falling object
W20.8XXA …… initial encounter
W20.8XXD …… subsequent encounter
W20.8XXS …… sequela
W21 Striking against or struck by sports equipment
W21.0 Struck by hit or thrown ball
W21.00 Struck by hit or thrown ball, unspecified type
W21.00XA …… initial encounter
W21.00XD …… subsequent encounter
W21.00XS …… sequela
W21.01 Struck by football
W21.01XA …… initial encounter
W21.01XD …… subsequent encounter
W21.01XS …… sequela
W21.02 Struck by soccer ball

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