Path fx in oth disease, l ankle, subs for fx w malunion

This code signifies a fracture of the left ankle that occurred due to an underlying medical condition, rather than trauma, and is currently being treated for improper healing. The "pathological" nature indicates the bone was weakened by another disease process, making it susceptible to fracture. "Malunion" specifies that the fracture fragments have healed in a misaligned or deformed position.

Use this code for a patient who has previously been treated for a pathological fracture of the left ankle and is now presenting for follow-up care related to its malunion. Documentation should clearly state a pathological fracture, specify the left ankle, and indicate that the fracture has healed incorrectly. This code is appropriate for subsequent encounters where the malunion is the focus of treatment or evaluation.

• Ensure documentation explicitly states "pathological fracture" and identifies the left ankle.
• Confirm the encounter is for the malunion of the fracture, not the initial treatment or routine follow-up of a well-healing fracture.
• Always code the underlying disease causing the pathological fracture first, if known and still active.