S83.9 - Sprain of unspecified site of knee S83 - Dislocation and sprain of joints and ligaments of knee S83.9 - Sprain of unspecified site of knee S83.90 - Sprain of unspecified site of unspecified knee S83.91 - Sprain of unspecified site of right knee S83.92 - Sprain of unspecified site of left knee