Pathological fracture, left fibula, subs for fx w nonunion

This code signifies a fracture of the left fibula that occurred due to an underlying disease process, rather than trauma. It specifically indicates that the fracture has not healed properly (nonunion) and the patient is receiving ongoing treatment for this complication.

Apply this code for follow-up encounters where a patient is being treated for a pathological fracture of the left fibula that has failed to unite. Documentation should clearly state "pathological fracture," specify the left fibula, and indicate "nonunion" during a subsequent phase of care.

• Ensure documentation explicitly states "pathological fracture" and not just a simple fracture.
• The "K" seventh character indicates subsequent encounter for nonunion; do not use for initial treatment or routine healing.
• Always code the underlying disease causing the pathological fracture first, if known and still active.