Oth fx r low leg, subs for opn fx type 3A/B/C w malunion

This code signifies a healed but improperly aligned (malunion) open fracture of the right lower leg, specifically one that was initially severe (Type IIIA, IIIB, or IIIC). It indicates that the patient is in the healing phase following the initial injury and subsequent treatment, but the bone has not united in an anatomically correct position.

Use this code for patients presenting with complications of a previously treated open fracture of the right lower leg, where imaging confirms malunion. This applies to follow-up visits where the malunion is being managed, such as for planning corrective surgery or assessing functional limitations.

• Always verify the laterality (right) and the specific type of open fracture (IIIA, IIIB, or IIIC) from the medical record.
• Ensure documentation clearly states "malunion" and that this is a subsequent encounter, not the initial treatment.
• Pair with external cause codes (e.g., V00-Y99) if the original injury's cause is still relevant for the encounter.