Flail joint, left shoulder

This code describes a flail joint affecting the left shoulder. A flail joint is characterized by abnormal, excessive, and uncontrolled mobility of a joint, often due to severe ligamentous laxity or paralysis of surrounding musculature, leading to instability and dysfunction. In the shoulder, this typically results in a loss of the joint's normal structural integrity and ability to maintain proper alignment.

Use this code when documentation explicitly states "flail joint" of the left shoulder. This condition is often seen following severe trauma, nerve damage (e.g., brachial plexus injury), or extensive surgical resections that compromise the joint's stability. Supporting documentation should clearly indicate the laterality and the specific diagnosis of a flail joint.

• Ensure documentation specifies "flail joint" and not just general instability or dislocation, which have different codes.
• Always confirm laterality (left shoulder) as there are distinct codes for right and bilateral involvement.
• Investigate the underlying cause of the flail joint if not documented, as an additional code for the etiology (e.g., nerve injury, fracture sequela) may be required.