Disp fx of post wall of left acetab, subs for fx w nonunion

This code signifies a fracture of the posterior wall of the left acetabulum (the socket of the hip joint) that is displaced, meaning the bone fragments are not in their normal alignment. The "K" seventh character indicates that the patient is receiving active treatment for a nonunion, where the fracture has failed to heal after an expected period.

This code is appropriate for encounters where a patient with a previously diagnosed displaced posterior wall acetabular fracture of the left hip is being treated for a confirmed nonunion. This could include surgical intervention for the nonunion, casting, or other active management aimed at promoting healing of the ununited fracture.

• Ensure documentation clearly states "nonunion" and specifies the "posterior wall" of the "left acetabulum."
• Verify that the fracture is explicitly described as "displaced" in the clinical notes.
• This seventh character "K" is only used for subsequent encounters when active treatment for the nonunion is being provided.