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ICD-10-CM Codes
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V00-Y99
External causes of morbidity
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W20-W49
Exposure to inanimate mechanical forces
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W20-
Struck by thrown, projected or falling object
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2021 ICD-10-CM Diagnosis Code W20.1
2021 ICD-10-CM Diagnosis Code W20.1
Struck by object due to collapse of building
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- W20.1 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 W20.1 became effective on October 1, 2020.
- This is the American ICD-10-CM version of W20.1 - other international versions of ICD-10 W20.1 may differ.
ICD-10-CM Coding Rules
- W20.1 describes the circumstance causing an injury, not the nature of the injury.
Type 1 ExcludesType 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 W20.1. 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.
The following code(s) above
W20.1 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
W20.1:
- V00-Y99
2021 ICD-10-CM Range V00-Y99
External causes of morbidityNote- 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
2021 ICD-10-CM Range W20-W49
Exposure to inanimate mechanical forcesType 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 - W20
ICD-10-CM Diagnosis Code W20
Struck by thrown, projected or falling object
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
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.-)
Struck by thrown, projected or falling object
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 W20.1:
- Collapse
- Fall, falling (accidental) W19
ICD-10-CM Diagnosis Code W19
Unspecified fall
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- Struck (accidentally)
- object W22.8
ICD-10-CM Diagnosis Code W22.8
Striking against or struck by other objects
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Applicable To- Striking against or struck by object NOS
Type 1 Excludes- struck by thrown, projected or falling object (W20.-)
- falling W20.8
ICD-10-CM Diagnosis Code W20.8
Other cause of strike by thrown, projected or falling object
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Type 1 Excludes- struck by thrown sports equipment (W21.-)
ICD-10-CM Codes Adjacent To W20.1
W19.XXXA Unspecified fall, initial encounter
W19.XXXD Unspecified fall, subsequent encounter
W20 Struck by thrown, projected or falling object
W20.0 Struck by falling object in cave-in
W20.1
Struck by object due to collapse of building
W20.8 Other cause of strike by thrown, projected or falling object
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
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.