ICD-10-CM > S00-T88 > S80-S89 > S81 > S81.8 > S81.80 > S81.809 S81.809 Unspecified open wound, unspecified lower leg Non-Billable/Non-Specific Codes S81.809A..., initial encounterS81.809D..., subsequent encounterS81.809S..., sequela