| W55.11 | Bitten by horse | NON-BILLABLE CODE |
| W55.11XA | Bitten by horse, initial encounter | BILLABLE CODE |
| W55.11XD | Bitten by horse, subsequent encounter | BILLABLE CODE |
| W55.11XS | Bitten by horse, sequela | BILLABLE CODE |
| W55.12 | Struck by horse | NON-BILLABLE CODE |
| W55.12XA | Struck by horse, initial encounter | BILLABLE CODE |
| W55.12XD | Struck by horse, subsequent encounter | BILLABLE CODE |
| W55.12XS | Struck by horse, sequela | BILLABLE CODE |
| W55.19 | Other contact with horse | NON-BILLABLE CODE |
| W55.19XA | Other contact with horse, initial encounter | BILLABLE CODE |
| W55.19XD | Other contact with horse, subsequent encounter | BILLABLE CODE |
| W55.19XS | Other contact with horse, sequela | BILLABLE CODE |
