ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.4 > S83.41 S83.41 Sprain of medial collateral ligament of knee Non-Billable/Non-Specific Applicable To Sprain of tibial collateral ligament Codes S83.411Sprain of medial collateral ligament of right kneeS83.411A..., initial encounterS83.411D..., subsequent encounterS83.411S..., sequelaS83.412Sprain of medial collateral ligament of left kneeS83.412A..., initial encounterS83.412D..., subsequent encounterS83.412S..., sequelaS83.419Sprain of medial collateral ligament of unspecified kneeS83.419A..., initial encounterS83.419D..., subsequent encounterS83.419S..., sequela