Stress fracture, left femur, subs for fx w nonunion

This code signifies a stress fracture of the left femur that has failed to heal properly after an initial treatment attempt. The patient is receiving active treatment for this nonunion, which may involve further surgical intervention or conservative management.

Apply this code when documentation indicates a patient is being treated for a stress fracture of the left femur that has not united. This typically occurs after an initial period of immobilization or treatment, and the fracture site shows no radiographic evidence of healing. Supporting documentation should clearly state "nonunion" and specify the left femur.

• Ensure the documentation explicitly states "nonunion" and not just delayed healing.
• Verify laterality (left femur) is clearly documented.
• This "K" seventh character indicates subsequent encounter for a fracture with nonunion, meaning the patient is still receiving active treatment for the nonunion.