Oth spon disrupt of anterior cruciate ligament of unsp knee

This code signifies a non-traumatic tear or rupture of the anterior cruciate ligament (ACL) in an unspecified knee. This disruption occurs without an external force or injury, distinguishing it from tears caused by acute trauma. It implies a degenerative process or an underlying weakness leading to the ligament's failure.

Use this code when documentation clearly indicates a spontaneous, non-traumatic rupture of the ACL, and the laterality of the affected knee is not specified. This typically applies when the patient presents with symptoms of an ACL tear but denies any specific injury event, and imaging confirms the disruption.

• Ensure documentation explicitly states "spontaneous" or "non-traumatic" to differentiate from acute traumatic tears.
• Avoid using this code if the laterality (right or left knee) is documented; instead, select the more specific code for the affected knee.
• Do not use this code for chronic instability or old tears unless the original disruption was spontaneous and the laterality is unknown.