Flail joint, left hip

This code describes a flail joint affecting the left hip. A flail joint is characterized by abnormal, excessive, and uncontrolled mobility due to severe ligamentous and capsular laxity, often resulting from neuromuscular compromise or extensive joint destruction. It signifies a loss of joint stability and functional integrity.

This code is appropriate when documentation explicitly states a "flail joint" of the left hip. It is typically seen in conditions involving significant joint damage, such as severe osteoarthritis, neuropathic arthropathy (e.g., Charcot joint), or following extensive trauma or surgical resection. Documentation should clearly indicate the left hip as the affected site and confirm the characteristic instability.

• Ensure documentation specifies "flail joint" and not just general instability or laxity, which would be coded differently.
• Always verify the laterality; this code is specific to the left hip.
• Consider sequencing this code after the underlying cause of the flail joint, if known and documented (e.g., neuropathic condition, severe arthritis).