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