Displ seg fx shaft of l fibula, subs for clos fx w nonunion

This code signifies a complex fracture involving a segment of the shaft of the left fibula, where the bone fragments are no longer in their normal alignment. Crucially, the fracture has failed to heal properly after an initial treatment, and the patient is presenting for follow-up care for this persistent nonunion, with the skin over the fracture site remaining intact.

Apply this code when a patient with a previously diagnosed displaced segmental fracture of the left fibula shaft returns for treatment or evaluation of a nonunion. This is appropriate for subsequent encounters where the fracture has not united and the skin is not broken. It would be used for scenarios such as follow-up appointments, imaging studies to assess nonunion, or planning for revision surgery for the nonunion.

• Ensure documentation clearly specifies "segmental" and "displaced" for the fibula shaft fracture.
• Verify that the encounter is for a "subsequent" visit related to the nonunion, not the initial injury.
• Confirm the fracture is "closed" (no open wound communicating with the fracture site) and explicitly states "nonunion."