Unsp fx lower end of unsp humerus, subs for fx w nonunion

This code signifies a fracture of the lower part of the humerus, where the specific location within the lower end is not documented, and the side (left or right) is also unknown. Crucially, it indicates that the fracture has failed to heal properly and the patient is presenting for follow-up care related to this nonunion.

This code is appropriate for subsequent encounters when a patient is being treated for a previously diagnosed, unspecified fracture of the distal humerus that has not united. This includes situations where surgical intervention for nonunion is being planned or has already occurred, or when conservative management for nonunion is ongoing.

• Ensure documentation clearly states "nonunion" for the fracture.
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture.
• If the specific location (e.g., supracondylar, intercondylar) or laterality (left/right) is known, a more specific code should be used.