Flail joint, left ankle and foot

This code signifies a flail joint affecting the left ankle and foot. A flail joint is characterized by abnormal, excessive, and uncontrolled mobility due to severe ligamentous laxity, muscle paralysis, or bone destruction, leading to instability and loss of function.

Use this code when documentation clearly indicates a diagnosis of a flail joint specifically located in the left ankle and/or foot. This condition often results from severe trauma, neurological deficits, or chronic inflammatory processes that compromise joint integrity.

• Ensure documentation specifies "flail joint" and not just general instability or laxity.
• Verify the laterality is explicitly stated as "left" for the ankle and foot.
• Consider sequencing this code with an underlying cause, such as a neurological condition or severe injury, if applicable and documented.