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

This code signifies a fracture of one or more metatarsal bones in an unspecified foot that has healed incorrectly, resulting in a malunion. This means the bone fragments have joined in a deformed position, potentially causing pain, altered foot mechanics, or functional impairment. The encounter documented is for ongoing treatment or evaluation of this malunited fracture.

Apply this code when a patient presents for follow-up care, assessment, or treatment of a metatarsal fracture that has previously healed in an unsatisfactory alignment. This includes scenarios where surgical correction of the malunion is being planned or evaluated, or when conservative management of the malunion's symptoms is ongoing.

• Ensure documentation clearly states "malunion" and that the encounter is subsequent to the initial fracture treatment.
• If the specific metatarsal bone(s) or foot (left/right) are documented, a more specific code within the S92.3 series should be used.
• Always sequence this code after any associated external cause codes, if applicable, and before codes for complications or manifestations of the malunion.