ICD-10-CM > S00-T88 > S90-S99 > S93 > S93.4 > S93.40 S93.40 Sprain of unspecified ligament of ankle Non-Billable/Non-Specific Applicable To Sprain of ankle NOSSprained ankle NOS Codes S93.401Sprain of unspecified ligament of right ankleS93.401A..., initial encounterS93.401D..., subsequent encounterS93.401S..., sequelaS93.402Sprain of unspecified ligament of left ankleS93.402A..., initial encounterS93.402D..., subsequent encounterS93.402S..., sequelaS93.409Sprain of unspecified ligament of unspecified ankleS93.409A..., initial encounterS93.409D..., subsequent encounterS93.409S..., sequela