Struck by thrown, projected or falling object
In Exposure to inanimate mechanical forces (W20-W49), chapter 20: External Causes of Morbidity
9 billable codes under W20: none are a CC or MCC; none map to an HCC.
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Instructional notes
Excludes1: not coded here, use a different code
Also applies, from Exposure to inanimate mechanical forces (W20-W49)
These notes sit on W20-W49 and apply to every code under it, including W20.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers how to report external cause codes (V00-Y99) describing cause, intent, place, activity, and status. They are never principal or first-listed, and reporting is voluntary unless required.
- General External Cause Coding Guidelines (page 88)
- Place of Occurrence Guideline (page 89)
- Activity Code (page 89)
- Place of Occurrence, Activity, and Status Codes Used with other External Cause Code (page 89)
- If the Reporting Format Limits the Number of External Cause Codes (page 90)
- Multiple External Cause Coding Guidelines (page 90)
- Child and Adult Abuse Guideline (page 90)
- Unknown or Undetermined Intent Guideline (page 91)
All codes under W20
W20 can't be used on a claim. Pick a billable code below; grey headings group them.
- W20.0Struck by falling object in cave-in
- W20.0XXAStruck by falling object in cave-in, initial encounter
- W20.0XXDStruck by falling object in cave-in, subsequent encounter
- W20.0XXSStruck by falling object in cave-in, sequela
- W20.1Struck by object due to collapse of building
- W20.1XXAStruck by object due to collapse of building, initial encounter
- W20.1XXDStruck by object due to collapse of building, subsequent encounter
- W20.1XXSStruck by object due to collapse of building, sequela
- W20.8Other cause of strike by thrown, projected or falling object
- W20.8XXAOther cause of strike by thrown, projected or falling object, initial encounter
- W20.8XXDOther cause of strike by thrown, projected or falling object, subsequent encounter
- W20.8XXSOther cause of strike by thrown, projected or falling object, sequela
W20 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to W20
Notes on these codes point to W20.
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.