Fx unsp metatarsal bone(s), r foot, subs for fx w nonunion

This code signifies a right foot metatarsal fracture that has failed to heal properly, as documented during a follow-up visit. Nonunion indicates that the bone ends have not united and healing has ceased, often requiring further intervention. This diagnosis is made after initial treatment attempts have been unsuccessful in achieving bone fusion.

Apply this code for a patient presenting for ongoing management of a right foot metatarsal fracture where the physician explicitly documents nonunion. This would be used during subsequent encounters after the initial treatment, such as for evaluation of persistent pain, imaging showing lack of healing, or planning for revision surgery. It is appropriate when the nonunion is the primary focus of the encounter.

• Ensure documentation clearly states "nonunion" of a right metatarsal fracture.
• Verify this is a subsequent encounter, not the initial treatment or routine follow-up for a healing fracture.
• Do not use if the fracture is healing normally or if the nonunion is in a different foot or bone.