ICD-10-CM > S00-T88 > S90-S99 > S99 > S99.9 > S99.91 S99.91 Unspecified injury of ankle Non-Billable/Non-Specific Codes S99.911Unspecified injury of right ankleS99.911A..., initial encounterS99.911D..., subsequent encounterS99.911S..., sequelaS99.912Unspecified injury of left ankleS99.912A..., initial encounterS99.912D..., subsequent encounterS99.912S..., sequelaS99.919Unspecified injury of unspecified ankleS99.919A..., initial encounterS99.919D..., subsequent encounterS99.919S..., sequela