Unsp fx low end l tibia, 7thN

This code signifies a non-healing fracture of the lower end of the left tibia that was initially an open fracture classified as Type IIIA, IIIB, or IIIC. "Nonunion" indicates that the bone fragments have failed to unite after a sufficient healing period, and the patient is presenting for follow-up care related to this ongoing complication.

Use this code for subsequent encounters where a patient is being treated for a persistent nonunion of a previously open, severe fracture of the distal left tibia. This includes situations where the patient is undergoing further surgical intervention, conservative management, or evaluation for the nonunion.

• Ensure documentation clearly specifies "nonunion" and the initial open fracture type (IIIA, IIIB, or IIIC).
• Verify the laterality (left tibia) and the specific location (lower end).
• This code is for subsequent encounters; an initial encounter for the fracture would use a different code.