Oth fx unsp lower leg, subs for opn fx type I/2 w malunion

This code signifies a healed or healing fracture of the lower leg, excluding the ankle, fibula, or tibia shaft, that was initially an open fracture (Type I or II) and has subsequently healed improperly, resulting in a malunion. The specific bone involved in the lower leg is not documented.

Apply this code when a patient presents for follow-up care of an open lower leg fracture (excluding specific sites) that has developed a malunion. This is appropriate for subsequent encounters after the initial treatment of the fracture.

• Ensure documentation clearly specifies "malunion" and that the initial fracture was an open Type I or II.
• Confirm the fracture location is "other lower leg" and not a more specific site like the tibia shaft or fibula.
• Verify this is a subsequent encounter, not the initial treatment of the fracture.