M23.6 - Other spontaneous disruption of ligament(s) of knee
M23.61 - Other spontaneous disruption of anterior cruciate ligament of knee
M23.611 - Other spontaneous disruption of anterior cruciate ligament of right knee
M23.612 - Other spontaneous disruption of anterior cruciate ligament of left knee
M23.619 - Other spontaneous disruption of anterior cruciate ligament of unspecified knee