| W20 | Struck by thrown, projected or falling object | NON-BILLABLE CODE |
| W20.0 | Struck by falling object in cave-in | NON-BILLABLE CODE |
| W20.0XXA | Struck by falling object in cave-in, initial encounter | BILLABLE CODE |
| W20.0XXD | Struck by falling object in cave-in, subsequent encounter | BILLABLE CODE |
| W20.1 | Struck by object due to collapse of building | NON-BILLABLE CODE |
| W20.1XXA | Struck by object due to collapse of building, initial encounter | BILLABLE CODE |
| W20.1XXD | Struck by object due to collapse of building, subsequent encounter | BILLABLE CODE |
| W20.1XXS | Struck by object due to collapse of building, sequela | BILLABLE CODE |
| W20.8 | Other cause of strike by thrown, projected or falling object | NON-BILLABLE CODE |
| W20.8XXA | Other cause of strike by thrown, projected or falling object, initial encounter | BILLABLE CODE |
| W20.8XXD | Other cause of strike by thrown, projected or falling object, subsequent encounter | BILLABLE CODE |
| W20.8XXS | Other cause of strike by thrown, projected or falling object, sequela | BILLABLE CODE |
