ICD-10-CM > S00-T88 > S80-S89 > S85 > S85.1 > S85.16 S85.16 Unspecified injury of posterior tibial artery Non-Billable/Non-Specific Codes S85.161Unspecified injury of posterior tibial artery, right legS85.161A..., initial encounterS85.161D..., subsequent encounterS85.161S..., sequelaS85.162Unspecified injury of posterior tibial artery, left legS85.162A..., initial encounterS85.162D..., subsequent encounterS85.162S..., sequelaS85.169Unspecified injury of posterior tibial artery, unspecified legS85.169A..., initial encounterS85.169D..., subsequent encounterS85.169S..., sequela