ICD-10-CM > S00-T88 > S90-S99 > S93 > S93.4 > S93.41 S93.41 Sprain of calcaneofibular ligament Non-Billable/Non-Specific Codes S93.411Sprain of calcaneofibular ligament of right ankleS93.411A..., initial encounterS93.411D..., subsequent encounterS93.411S..., sequelaS93.412Sprain of calcaneofibular ligament of left ankleS93.412A..., initial encounterS93.412D..., subsequent encounterS93.412S..., sequelaS93.419Sprain of calcaneofibular ligament of unspecified ankleS93.419A..., initial encounterS93.419D..., subsequent encounterS93.419S..., sequela