Monteggia's fx left ulna, subs for clos fx w delay heal

This code signifies a Monteggia's fracture affecting the left ulna, specifically when the patient is receiving ongoing treatment for a closed fracture that is not healing at the expected rate. A Monteggia's fracture is a complex injury involving a fracture of the ulna and a dislocation of the radial head. The "delayed healing" aspect indicates that the bone union process is prolonged.

Apply this code when documenting follow-up care for a patient with a previously diagnosed closed Monteggia's fracture of the left ulna, and the physician notes that the fracture is not progressing to healing as anticipated. This would be used during subsequent encounters after the initial treatment, such as during cast changes, physical therapy, or follow-up imaging to assess bone union.

• Ensure documentation clearly states "left ulna" and "Monteggia's fracture."
• Verify the fracture is explicitly noted as "closed" and experiencing "delayed healing."
• This code is for subsequent encounters; an initial encounter code would be used for the acute injury.