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