ICD-10-CM > S00-T88 > S90-S99 > S91 > S91.0 > S91.00 S91.00 Unspecified open wound of ankle Non-Billable/Non-Specific Codes S91.001Unspecified open wound, right ankleS91.001A..., initial encounterS91.001D..., subsequent encounterS91.001S..., sequelaS91.002Unspecified open wound, left ankleS91.002A..., initial encounterS91.002D..., subsequent encounterS91.002S..., sequelaS91.009Unspecified open wound, unspecified ankleS91.009A..., initial encounterS91.009D..., subsequent encounterS91.009S..., sequela