ICD-10-CM Codes
V00-Y99 External causes of morbidity
W20-W49 Exposure to inanimate mechanical forces
W20- Struck by thrown, projected or falling object
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 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 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.

struck by object due to collapse of burning building (
ICD-10-CM Diagnosis Code X00.2
Injury due to collapse of burning building or structure in uncontrolled fire
Type 1 Excludes
- injury due to collapse of building not on fire (W20.1)
X00.2
,
ICD-10-CM Diagnosis Code X02.2
Injury due to collapse of burning building or structure in controlled fire
Type 1 Excludes
- injury due to collapse of building not on fire (W20.1)
X02.2
)

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 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
2021 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
W20
ICD-10-CM Diagnosis Code W20
Struck by thrown, projected or falling object
Code First
- any associated:
- cataclysm (X34-X39)
- lightning strike (T75.00)
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:

Type 1 Excludes: X00.2
, X02.2

ICD-10-CM Diagnosis Code X00.2
Injury due to collapse of burning building or structure in uncontrolled fire
Type 1 Excludes
- injury due to collapse of building not on fire (W20.1)
ICD-10-CM Diagnosis Code X02.2
Injury due to collapse of burning building or structure in controlled fire
Type 1 Excludes
- injury due to collapse of building not on fire (W20.1)

External Cause Index entries containing back-references to W20.1:

Collapse
- building W20.1
- structure W20.1
Fall, falling (accidental) W19
ICD-10-CM Diagnosis Code W19
Unspecified fall
Applicable To
Accidental fall NOS
- building W20.1
- structure W20.1
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.-)
    - from, in, on
      - building W20.1
      - structure W20.1

ICD-10-CM Codes Adjacent To W20.1

W18.49XS …… sequela

W19 Unspecified fall

W19.XXXA Unspecified fall, initial encounter

W19.XXXD Unspecified fall, subsequent encounter

W19.XXXS Unspecified fall, sequela

W20 Struck by thrown, projected or falling object

W20.0 Struck by falling object in cave-in

W20.0XXA …… initial encounter

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

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

2021 ICD-10-CM Diagnosis Code W20.1

Struck by object due to collapse of building

Injury due to collapse of burning building or structure in uncontrolled fire

Injury due to collapse of burning building or structure in controlled fire

External causes of morbidity

Exposure to inanimate mechanical forces

Struck by thrown, projected or falling object

Injury due to collapse of burning building or structure in uncontrolled fire

Injury due to collapse of burning building or structure in controlled fire

Unspecified fall

Striking against or struck by other objects

Other cause of strike by thrown, projected or falling object