Unsp fx l low leg, subs for opn fx type I/2 w nonunion

This code signifies an unspecified fracture of the left lower leg that has progressed to a nonunion, meaning the bone has failed to heal properly. It specifically applies to open fractures of Type I or II, indicating a break in the skin with minimal to moderate soft tissue damage. The "subsequent encounter" aspect denotes ongoing treatment for the nonunion.

Use this code for patients presenting for follow-up care, surgical intervention, or other management related to a nonunion of a previously sustained open Type I or II fracture of the left lower leg. This would include scenarios where the patient is undergoing treatment to promote healing of the nonunion.

• Ensure documentation clearly specifies "nonunion" and the "subsequent encounter" for ongoing care.
• Verify the original fracture was an open Type I or II to align with the code's specificity.
• Distinguish from malunion (improperly healed) or delayed union (healing slower than expected) as these have different codes.