Unsp fx l low leg, subs for opn fx type I/2 w malunion

This code signifies an unspecified break in the left lower leg bone(s) that was initially an open fracture (Type I or II) and is now being treated for improper healing, specifically malunion. The fracture type is not further specified (e.g., tibia, fibula, or both).

Apply this code when a patient presents for follow-up care or treatment of a previously sustained open fracture (Type I or II) of the left lower leg, and imaging or clinical assessment confirms that the bone fragments have healed in an anatomically incorrect position. This code is appropriate for subsequent encounters where the malunion is the primary focus of the visit.

• Ensure documentation clearly states "left lower leg" and "malunion" in the context of a previous open fracture (Type I or II).
• Confirm this is a "subsequent encounter" and not the initial treatment for the fracture.
• If the specific bone (tibia or fibula) is known, a more specific code should be used.