Unsp fracture of unsp lower leg, subs for clos fx w nonunion

This code signifies a fracture of an unknown bone in the lower leg (tibia, fibula, or ankle) that has not healed properly, and the patient is presenting for follow-up care. The fracture was initially closed, meaning the skin was not broken. The nonunion indicates a failure of the bone to mend after a reasonable period.

This code is appropriate for patients returning for ongoing management of a lower leg fracture where the specific bone involved was not documented, and the fracture has failed to unite. This would include scenarios where a patient is undergoing further treatment, such as bone grafting or revision surgery, for a persistent nonunion of an unspecified lower leg fracture.

• Ensure documentation clearly states "nonunion" and "subsequent encounter" for a closed fracture.
• Avoid this code if the specific bone (tibia, fibula, or ankle) is identified; use a more specific code from the S82 series.
• Always review the medical record for any laterality (left/right) or more specific fracture type that might allow for a more precise code.