Flail joint, left knee

This code signifies a flail joint specifically affecting the left knee. A flail joint is characterized by abnormal, excessive, and uncontrolled mobility due to severe ligamentous laxity or complete disruption, often resulting from significant trauma or neuromuscular deficits. This instability compromises the knee's ability to bear weight and perform controlled movements.

Use this code when documentation clearly indicates a diagnosis of a flail joint in the left knee. This typically arises from severe injuries, such as multi-ligamentous tears, or conditions leading to neuromuscular paralysis affecting the joint's stability. Supporting documentation should detail the extent of instability and the specific joint involved.

• Ensure documentation specifies "flail joint" and not just general instability or laxity.
• Verify the laterality; this code is specific to the left knee.
• Consider sequencing this code after any underlying cause (e.g., severe trauma, neurological condition) if applicable and documented.