M23.6 - Other spontaneous disruption of ligament(s) of knee
M23.64 - Other spontaneous disruption of lateral collateral ligament of knee
M23.641 - Other spontaneous disruption of lateral collateral ligament of right knee
M23.642 - Other spontaneous disruption of lateral collateral ligament of left knee
M23.649 - Other spontaneous disruption of lateral collateral ligament of unspecified knee