Unsp fx lower end of left tibia, subs for clos fx w malunion

This code signifies a fracture of the lower end of the left tibia that has not been specified further, and the patient is now in a subsequent phase of care. Crucially, the fracture was initially closed, and it has healed improperly, resulting in a malunion. This indicates a complication in the healing process where the bone fragments have united in a deformed or misaligned position.

Use this code when documenting follow-up care for a patient whose initial closed fracture of the distal left tibia has resulted in malunion. This applies to situations where the malunion is being monitored, or the patient is undergoing treatment for this specific complication. It is appropriate for encounters after the initial treatment phase of the acute fracture.

• Ensure documentation clearly states "malunion" and specifies the "left tibia" and "lower end" to support this code.
• Verify the fracture was initially "closed" as this code is specific to closed fractures.
• Do not use for initial encounters or for nonunion, which is a distinct complication.