| W31 | Contact with other and unspecified machinery | NON-BILLABLE CODE |
| W31.0 | Contact with mining and earth-drilling machinery | NON-BILLABLE CODE |
| W31.0XXA | Contact with mining and earth-drilling machinery, initial encounter | BILLABLE CODE |
| W31.0XXD | Contact with mining and earth-drilling machinery, subsequent encounter | BILLABLE CODE |
| W31.1 | Contact with metalworking machines | NON-BILLABLE CODE |
| W31.1XXA | Contact with metalworking machines, initial encounter | BILLABLE CODE |
| W31.1XXD | Contact with metalworking machines, subsequent encounter | BILLABLE CODE |
| W31.1XXS | Contact with metalworking machines, sequela | BILLABLE CODE |
| W31.2 | Contact with powered woodworking and forming machines | NON-BILLABLE CODE |
| W31.2XXA | Contact with powered woodworking and forming machines, initial encounter | BILLABLE CODE |
| W31.2XXD | Contact with powered woodworking and forming machines, subsequent encounter | BILLABLE CODE |
| W31.2XXS | Contact with powered woodworking and forming machines, sequela | BILLABLE CODE |
| W31.3 | Contact with prime movers | NON-BILLABLE CODE |
| W31.3XXA | Contact with prime movers, initial encounter | BILLABLE CODE |
| W31.3XXD | Contact with prime movers, subsequent encounter | BILLABLE CODE |
| W31.3XXS | Contact with prime movers, sequela | BILLABLE CODE |
| W31.8 | Contact with other specified machinery | NON-BILLABLE CODE |
| W31.81 | Contact with recreational machinery | NON-BILLABLE CODE |
| W31.81XA | Contact with recreational machinery, initial encounter | BILLABLE CODE |
| W31.81XD | Contact with recreational machinery, subsequent encounter | BILLABLE CODE |
| W31.81XS | Contact with recreational machinery, sequela | BILLABLE CODE |
| W31.82 | Contact with other commercial machinery | NON-BILLABLE CODE |
| W31.82XA | Contact with other commercial machinery, initial encounter | BILLABLE CODE |
| W31.82XD | Contact with other commercial machinery, subsequent encounter | BILLABLE CODE |
| W31.82XS | Contact with other commercial machinery, sequela | BILLABLE CODE |
| W31.83 | Contact with special construction vehicle in stationary use | NON-BILLABLE CODE |
| W31.83XA | Contact with special construction vehicle in stationary use, initial encounter | BILLABLE CODE |
| W31.83XD | Contact with special construction vehicle in stationary use, subsequent encounter | BILLABLE CODE |
| W31.83XS | Contact with special construction vehicle in stationary use, sequela | BILLABLE CODE |
| W31.89 | Contact with other specified machinery | NON-BILLABLE CODE |
| W31.89XA | Contact with other specified machinery, initial encounter | BILLABLE CODE |
| W31.89XD | Contact with other specified machinery, subsequent encounter | BILLABLE CODE |
| W31.89XS | Contact with other specified machinery, sequela | BILLABLE CODE |
| W31.9 | Contact with unspecified machinery | NON-BILLABLE CODE |
| W31.9XXA | Contact with unspecified machinery, initial encounter | BILLABLE CODE |
| W31.9XXD | Contact with unspecified machinery, subsequent encounter | BILLABLE CODE |
| W31.9XXS | Contact with unspecified machinery, sequela | BILLABLE CODE |
