ICD-10-CM > S00-T88 > S90-S99 > S93 > S93.4 > S93.42 S93.42 Sprain of deltoid ligament Non-Billable/Non-Specific Codes S93.421Sprain of deltoid ligament of right ankleS93.421A..., initial encounterS93.421D..., subsequent encounterS93.421S..., sequelaS93.422Sprain of deltoid ligament of left ankleS93.422A..., initial encounterS93.422D..., subsequent encounterS93.422S..., sequelaS93.429Sprain of deltoid ligament of unspecified ankleS93.429A..., initial encounterS93.429D..., subsequent encounterS93.429S..., sequela