| Y23 | Rifle, shotgun and larger firearm discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.0 | Shotgun discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.0XXA | Shotgun discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.0XXD | Shotgun discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.0XXS | Shotgun discharge, undetermined intent, sequela | BILLABLE CODE |
| Y23.1 | Hunting rifle discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.1XXA | Hunting rifle discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.1XXD | Hunting rifle discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.1XXS | Hunting rifle discharge, undetermined intent, sequela | BILLABLE CODE |
| Y23.2 | Military firearm discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.2XXA | Military firearm discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.2XXD | Military firearm discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.2XXS | Military firearm discharge, undetermined intent, sequela | BILLABLE CODE |
| Y23.3 | Machine gun discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.3XXA | Machine gun discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.3XXD | Machine gun discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.3XXS | Machine gun discharge, undetermined intent, sequela | BILLABLE CODE |
| Y23.8 | Other larger firearm discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.8XXA | Other larger firearm discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.8XXD | Other larger firearm discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.9 | Unspecified larger firearm discharge, undetermined intent | NON-BILLABLE CODE |
| Y23.9XXA | Unspecified larger firearm discharge, undetermined intent, initial encounter | BILLABLE CODE |
| Y23.9XXD | Unspecified larger firearm discharge, undetermined intent, subsequent encounter | BILLABLE CODE |
| Y23.9XXS | Unspecified larger firearm discharge, undetermined intent, sequela | BILLABLE CODE |
