2021

  1. ICD-10-CM Codes
    2. ›
  2. V00-Y99 External causes of morbidity
    3. ›
  3. W50-W64 Exposure to animate mechanical forces
    4. ›
  4. W51- Accidental striking against or bumped into by another person
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code W51

2021 ICD-10-CM Diagnosis Code W51

Accidental striking against or bumped into by another person

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • W51 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM W51 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of W51 - other international versions of ICD-10 W51 may differ.
ICD-10-CM Coding Rules
  • W51 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 W51. 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 by striking against or bumping into by another person (
    ICD-10-CM Diagnosis Code Y04.2

    Assault by strike against or bumped into by another person

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Y04.2
    )
  • fall due to collision with another person (
    ICD-10-CM Diagnosis Code W03

    Other fall on same level due to collision with another person

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Fall due to non-transport collision with other person
    Type 1 Excludes
    • collision with another person without fall (W51)
    • crushed or pushed by a crowd or human stampede (W52)
    • fall involving pedestrian conveyance (V00-V09)
    • fall due to ice or snow (W00)
    • fall on same level NOS (W18.30)
    W03
    )
The following code(s) above W51 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 W51:
  • 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
  • W50-W64
    2021 ICD-10-CM Range W50-W64

    Exposure to animate mechanical forces

    Type 1 Excludes
    • Toxic effect of contact with venomous animals and plants (T63.-)
    Exposure to animate 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
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to W51:
  • Type 1 Excludes: V00
    , W03
    , W18.4
    ICD-10-CM Diagnosis Code V00

    Pedestrian conveyance accident

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • collision with another person without fall (W51)
    • fall due to person on foot colliding with another person on foot (W03)
    • fall from non-moving wheelchair, nonmotorized scooter and motorized mobility scooter without collision (W05.-)
    • pedestrian (conveyance) collision with other land transport vehicle (V01-V09)
    • pedestrian on foot falling (slipping) on ice and snow (W00.-)
    Use Additional
    • place of occurrence and activity external cause codes, if known (Y92.-, Y93.-)
    ICD-10-CM Diagnosis Code W03

    Other fall on same level due to collision with another person

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Fall due to non-transport collision with other person
    Type 1 Excludes
    • collision with another person without fall (W51)
    • crushed or pushed by a crowd or human stampede (W52)
    • fall involving pedestrian conveyance (V00-V09)
    • fall due to ice or snow (W00)
    • fall on same level NOS (W18.30)
    ICD-10-CM Diagnosis Code W18.4

    Slipping, tripping and stumbling without falling

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • collision with another person without fall (W51)

External Cause Index entries containing back-references to W51:

ICD-10-CM Codes Adjacent To W51
W50.2XXD …… subsequent encounter
W50.2XXS …… sequela
W50.3 Accidental bite by another person
W50.3XXA …… initial encounter
W50.3XXD …… subsequent encounter
W50.3XXS …… sequela
W50.4 Accidental scratch by another person
W50.4XXA …… initial encounter
W50.4XXD …… subsequent encounter
W50.4XXS …… sequela
W51 Accidental striking against or bumped into by another person
W51.XXXA Accidental striking against or bumped into by another person, initial encounter
W51.XXXD Accidental striking against or bumped into by another person, subsequent encounter
W51.XXXS Accidental striking against or bumped into by another person, sequela
W52 Crushed, pushed or stepped on by crowd or human stampede
W52.XXXA Crushed, pushed or stepped on by crowd or human stampede, initial encounter
W52.XXXD Crushed, pushed or stepped on by crowd or human stampede, subsequent encounter
W52.XXXS Crushed, pushed or stepped on by crowd or human stampede, sequela
W53 Contact with rodent
W53.0 Contact with mouse
W53.01 Bitten by mouse

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

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