Displaced pilon fx left tibia, subs for clos fx w malunion

This code describes a subsequent encounter for a left tibial pilon fracture that was initially displaced and has now healed incorrectly, resulting in a malunion. A pilon fracture involves the weight-bearing surface of the distal tibia, often extending into the ankle joint. The malunion indicates that the bone fragments have united in an anatomically incorrect position.

This code is appropriate when a patient presents for follow-up care, such as evaluation, cast change, or physical therapy, for a previously treated left tibial pilon fracture that has developed a malunion. It signifies that the fracture is no longer acute but is still undergoing management due to the healing complication. This code would be used after the initial active treatment phase of the fracture.

• Ensure documentation clearly states "left tibia," "pilon fracture," "displaced," and "malunion."
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture or a new injury.
• Confirm that the fracture is documented as "closed" at the time of the malunion assessment.