S80.21Non-Billable (Header)Abrasion of kneeChild CodesS80.211Abrasion, right kneeS80.212Abrasion, left kneeS80.219Abrasion, unspecified kneeCode Hierarchy└S80Superficial injury of knee and lower leg└S80.2Other superficial injuries of knee└S80.21Abrasion of knee└S80.21Abrasion of knee