Oth fx l low leg, subs for opn fx type I/2 w malunion

This code signifies a healed or healing fracture of the left lower leg, specifically an open fracture of Gustilo type I or II, where the bone has mended in a misaligned or deformed position. It indicates that the patient is in the follow-up phase of treatment for this malunion.

Apply this code when documenting ongoing care for a patient who previously sustained an open fracture of the left lower leg (type I or II) and has developed malunion. This is appropriate for subsequent encounters after the initial treatment of the fracture, such as during physical therapy, follow-up orthopedic visits, or prior to corrective surgery for the malunion.

• Ensure documentation clearly specifies "left lower leg" and confirms the original fracture was an "open type I or II."
• Verify that the encounter is for follow-up care related to the malunion, not the initial fracture treatment.
• Pair with an external cause code if the original injury mechanism is relevant to the current encounter.