ICD-10-CM > S00-T88 > S80-S89 > S80 > S80.2 > S80.21 S80.21 Abrasion of knee Non-Billable/Non-Specific Codes S80.211Abrasion, right kneeS80.211A..., initial encounterS80.211D..., subsequent encounterS80.211S..., sequelaS80.212Abrasion, left kneeS80.212A..., initial encounterS80.212D..., subsequent encounterS80.212S..., sequelaS80.219Abrasion, unspecified kneeS80.219A..., initial encounterS80.219D..., subsequent encounterS80.219S..., sequela