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

This code describes a left lower leg fracture, not otherwise specified as a specific type (e.g., tibia, fibula), that has previously been treated but is now healing improperly (malunion). The original injury was an open fracture, meaning the skin was broken, and it was classified as a severe type (IIIA, IIIB, or IIIC) according to the Gustilo-Anderson classification.

Use this code for follow-up encounters where a patient is being managed for a malunion of a previously treated severe open fracture of the left lower leg. This typically applies when the patient presents for evaluation of persistent pain, deformity, or functional limitations related to the improper healing.

• Ensure documentation clearly specifies "malunion" and the "subsequent encounter" status.
• Verify the original fracture was an open fracture of type IIIA, IIIB, or IIIC.
• Confirm the fracture location is the left lower leg, and not a more specific bone within the lower leg if a more precise code is available.