Oth fx upr and low end l fibula, subs for clos fx w malunion

This code signifies a malunion of a previously sustained fracture in the upper or lower end of the left fibula, which is currently being managed as a closed fracture. Malunion indicates that the bone has healed, but in an anatomically incorrect or suboptimal position.

Apply this code for follow-up encounters where a patient presents with a healed, but misaligned, fracture of the proximal or distal left fibula. This is appropriate when the fracture is no longer open and the focus of care is on the consequences of the malunion, such as pain, deformity, or functional limitation.

• Ensure documentation clearly specifies "malunion" and the location as the upper or lower end of the left fibula.
• Verify that the encounter is for a "subsequent" phase of care, not initial treatment.
• Confirm the fracture is "closed"; if open, a different seventh character would be required.