Nondisp Maisonneuve's fx r leg, 7thN

This code describes a specific type of ankle fracture involving a spiral fracture of the proximal fibula with an associated ankle injury (Maisonneuve's fracture) in the right leg. The fracture is nondisplaced, meaning the bone fragments are still in their normal alignment, and it is an open fracture of a severe type (IIIA, IIIB, or IIIC) that has failed to heal properly (nonunion).

Use this code for a patient who has previously been treated for a severe open Maisonneuve's fracture of the right leg, and during the current encounter, the physician documents that the fracture has not united. This code is appropriate for follow-up visits where the nonunion is being managed, such as for surgical planning for revision or bone grafting.

• Ensure documentation clearly specifies "nondisplaced" and "right leg" for the Maisonneuve's fracture.
• Verify the open fracture type (IIIA, IIIB, or IIIC) and the presence of "nonunion" are explicitly stated in the medical record.
• This "N" seventh character indicates a subsequent encounter for a nonunion, not the initial treatment.