| S99.911 | Unspecified injury of right ankle | NON-BILLABLE CODE |
| S99.911A | Unspecified injury of right ankle, initial encounter | BILLABLE CODE |
| S99.911D | Unspecified injury of right ankle, subsequent encounter | BILLABLE CODE |
| S99.911S | Unspecified injury of right ankle, sequela | BILLABLE CODE |
| S99.912 | Unspecified injury of left ankle | NON-BILLABLE CODE |
| S99.912A | Unspecified injury of left ankle, initial encounter | BILLABLE CODE |
| S99.912D | Unspecified injury of left ankle, subsequent encounter | BILLABLE CODE |
| S99.912S | Unspecified injury of left ankle, sequela | BILLABLE CODE |
| S99.919 | Unspecified injury of unspecified ankle | NON-BILLABLE CODE |
| S99.919A | Unspecified injury of unspecified ankle, initial encounter | BILLABLE CODE |
| S99.919D | Unspecified injury of unspecified ankle, subsequent encounter | BILLABLE CODE |
| S99.919S | Unspecified injury of unspecified ankle, sequela | BILLABLE CODE |
