Disp fx of 4th metatarsal bone, r ft, subs for fx w nonunion

This code signifies a right fourth metatarsal fracture that is displaced, meaning the bone fragments are not in their normal alignment. The "nonunion" aspect indicates that the fracture has failed to heal completely after a typical healing period, requiring further medical attention.

This code is appropriate for follow-up encounters where a patient is being treated for a previously diagnosed displaced fracture of the right fourth metatarsal, and the fracture has not united. This includes situations where surgical intervention or other treatments are being performed to address the nonunion.

• Ensure documentation clearly specifies "nonunion" and not just delayed healing.
• Verify the laterality (right foot) and the specific metatarsal (fourth).
• This code is for subsequent encounters; an initial encounter would use a different seventh character.