ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.4 > S83.41 > S83.412 S83.412 Sprain of medial collateral ligament of left knee Non-Billable/Non-Specific Codes S83.412A..., initial encounterS83.412D..., subsequent encounterS83.412S..., sequela