ICD-10-CM > S00-T88 > S80-S89 > S85 > S85.1 > S85.18 S85.18 Other specified injury of posterior tibial artery Non-Billable/Non-Specific Codes S85.181Other specified injury of posterior tibial artery, right legS85.181A..., initial encounterS85.181D..., subsequent encounterS85.181S..., sequelaS85.182Other specified injury of posterior tibial artery, left legS85.182A..., initial encounterS85.182D..., subsequent encounterS85.182S..., sequelaS85.189Other specified injury of posterior tibial artery, unspecified legS85.189A..., initial encounterS85.189D..., subsequent encounterS85.189S..., sequela