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

This code signifies a right foot metatarsal fracture that is currently healing, but with an abnormal alignment of the bone fragments. The patient is receiving ongoing care for this previously sustained injury, where the bone has not united correctly.

Apply this code when documenting follow-up care for a patient with a right metatarsal fracture that has developed malunion. This includes scenarios where the patient is undergoing treatment for the malunion, such as physical therapy, bracing, or preparing for corrective surgery.

• Ensure documentation clearly states "malunion" and specifies the right foot.
• Verify this is a subsequent encounter, not the initial treatment for the fracture.
• Pair with external cause codes (e.g., V00-Y99) if the cause of the original fracture is still relevant and documented.