In simple words: This code refers to a follow-up visit for a broken thigh bone just above the knee. The break was severe, involving a wound, and the bone has not healed correctly.

This code describes a break in the thigh bone just above the knee joint, where the broken pieces haven't healed properly (malunion).It's specifically for cases where the skin was broken during the injury (open fracture types IIIA, IIIB, or IIIC according to the Gustilo classification), and it's not the initial visit for this injury (subsequent encounter).

Example 1: A patient returns for a follow-up appointment after an open fracture of the distal femur, classified as Gustilo type IIIA. The fracture has healed with some angulation, causing pain and limited mobility., A patient initially presented with a Gustilo type IIIB open fracture of the distal femur. After several weeks, they present for a follow-up appointment and imaging shows malunion of the fracture., A patient who had an open fracture of their distal femur (Gustilo type IIIC) is experiencing ongoing pain and functional limitations. They return to the clinic where it's determined that the fracture has malunited.

Documentation should include the type of fracture (open, Gustilo classification), location (distal femur), evidence of malunion, the date of the original injury, and all treatment provided.