ICD-10-CM > S00-T88 > S80-S89 > S83 > S83.5 > S83.52 > S83.521 S83.521 Sprain of posterior cruciate ligament of right knee Non-Billable/Non-Specific Codes S83.521A..., initial encounterS83.521D..., subsequent encounterS83.521S..., sequela