Breakdown (mechanical) of int fix of bone of l low leg, subs

This code signifies a mechanical failure of an internal fixation device, such as a plate, screw, or rod, that was surgically implanted to stabilize a bone fracture in the patient's left lower leg. The breakdown is not due to infection or malunion, but rather a structural failure of the device itself. This code is used when the patient is receiving routine care during the healing phase of the fracture, after the initial treatment.

Use this code for patients presenting with symptoms or radiographic evidence of a broken or loosened internal fixation device in the left tibia or fibula during a follow-up visit. This applies when the patient is still undergoing active treatment for the fracture, but beyond the initial acute care. Examples include a patient returning for a scheduled check-up where imaging reveals a fractured plate or a patient reporting new pain and swelling due to a screw backing out.

• Ensure documentation clearly specifies "mechanical breakdown" and not an infection or nonunion.
• Verify the laterality is "left lower leg" as specified by the code.
• Confirm this is a "subsequent encounter," meaning the patient is receiving ongoing care for the fracture and device issue, not initial treatment.