ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.4 > S83.40 > S83.402 S83.402 Sprain of unspecified collateral ligament of left knee Non-Billable/Non-Specific Codes S83.402A..., initial encounterS83.402D..., subsequent encounterS83.402S..., sequela