Unsp fx lower end of left femur, subs for clos fx w nonunion

This code signifies a fracture of the lower portion of the left thigh bone that has not healed properly after an initial injury. The fracture is closed, meaning the skin over the injury is intact, and the patient is presenting for follow-up care related to this ongoing healing complication.

Apply this code when a patient with a previously diagnosed and treated closed fracture of the distal left femur returns for management of a confirmed nonunion. This typically involves ongoing treatment, assessment, or surgical intervention for the failure of the bone fragments to unite.

• Ensure documentation clearly states "nonunion" and specifies the left lower femur.
• Verify the encounter is for subsequent care, not the initial treatment of the fracture.
• Confirm the fracture is explicitly documented as "closed."