Stress fracture, left foot, subs for fx w nonunion

This code signifies a stress fracture located in the left foot that has failed to heal properly, indicating a nonunion. It is used when the patient is receiving active treatment for the nonunion after the initial fracture care.

Apply this code when documentation clearly states a stress fracture of the left foot with evidence of nonunion, and the patient is undergoing follow-up treatment for this specific complication. This typically includes scenarios where surgical intervention, bone stimulation, or other advanced therapies are being pursued to address the nonunion.

• Ensure documentation specifies "stress fracture" and not another type of fracture.
• Verify laterality (left foot) and the "subsequent encounter" status for ongoing treatment.
• Confirm "nonunion" is explicitly documented, as opposed to delayed union or routine healing.