Dislocation of patella, open

This code describes an open dislocation of the patella, meaning the kneecap has been displaced from its normal position and there is an associated open wound communicating with the joint or the bone. This injury typically involves significant trauma and carries a higher risk of infection compared to a closed dislocation.

Use this code when documentation clearly states an "open" patellar dislocation, often resulting from direct trauma or a penetrating injury. The presence of a wound communicating with the dislocated joint is the key differentiator. Documentation should specify the open nature of the injury.

• Differentiate carefully between open and closed dislocations; the presence of an open wound is critical for this code.
• Do not use this code for recurrent or chronic patellar instability without an acute traumatic open dislocation.
• Consider additional codes for associated injuries, such as fractures or soft tissue damage, if documented.