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

This code signifies an unspecified fracture of the lower leg that is currently being treated for a malunion, specifically following an initial open fracture of either Type I or Type II. Malunion indicates that the fracture has healed, but in an unsatisfactory position, leading to functional impairment or deformity.

This code is appropriate for encounters where a patient is receiving ongoing care for a lower leg fracture that has healed incorrectly after an initial open injury. This includes follow-up visits for assessment, planning for corrective surgery, or management of complications arising from the malunion. It is used when the specific bone fractured in the lower leg (tibia, fibula, or both) is not documented.

• Ensure documentation clearly states "malunion" and specifies the initial injury was an "open fracture type I or II."
• Do not use this code for nonunion; a different code exists for that complication.
• If the specific bone fractured in the lower leg is known, a more specific code should be utilized.