Other instability, left ankle

This code signifies a chronic or recurrent laxity of the ligaments supporting the left ankle joint, leading to symptomatic instability. It indicates that the ankle joint is prone to giving way or feeling unstable during weight-bearing or activity, without evidence of a current acute sprain or fracture.

Apply this code when documentation clearly indicates ongoing left ankle instability not classifiable as an acute sprain, subluxation, or dislocation. This often follows previous ankle injuries and presents with symptoms like recurrent "giving way," chronic pain, or difficulty with uneven surfaces. Supporting documentation includes physical exam findings of ligamentous laxity, patient history of recurrent ankle sprains, and imaging ruling out other acute pathology.

• Ensure the documentation specifies "left" ankle; laterality is crucial for this code.
• Do not use this code for acute ankle sprains; refer to the S93.4- series for those.
• Consider sequencing this code after any underlying cause, if identified and treated, such as a previous fracture.