M23.6 - Other spontaneous disruption of ligament(s) of knee
M23.60 - Other spontaneous disruption of unspecified ligament of knee
M23.601 - Other spontaneous disruption of unspecified ligament of right knee
M23.602 - Other spontaneous disruption of unspecified ligament of left knee
M23.609 - Other spontaneous disruption of unspecified ligament of unspecified knee