ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.4 > S83.41 > S83.419 S83.419 Sprain of medial collateral ligament of unspecified knee Non-Billable/Non-Specific Codes S83.419A..., initial encounterS83.419D..., subsequent encounterS83.419S..., sequela