Nondisp pilon fx l tibia, 7thR

This code describes a pilon fracture of the left tibia that was initially an open fracture (Type IIIA, IIIB, or IIIC) and is now in a subsequent phase of healing with evidence of malunion. A pilon fracture involves the weight-bearing surface of the distal tibia, near the ankle joint. Malunion indicates that the bone has healed in an unsatisfactory position, potentially leading to functional impairment.

Use this code for follow-up encounters with a patient who previously sustained an open pilon fracture of the left tibia, and imaging or clinical assessment confirms that the fracture has healed, but in an anatomically incorrect alignment. This would apply when evaluating the malunion for potential corrective surgery or managing its long-term effects.

• Ensure documentation clearly specifies "malunion" and the "subsequent encounter" status.
• Verify the laterality (left tibia) and the initial open fracture type (IIIA, IIIB, or IIIC).
• Do not use for nonunion; a separate code exists for that complication.