Disp fx of 3rd metatarsal bone, l ft, subs for fx w malunion

This code signifies a left third metatarsal bone fracture that was initially displaced but has healed improperly, resulting in a malunion. The patient is currently receiving care for this specific complication of the previous fracture.

This code is appropriate for follow-up encounters where a patient presents with ongoing issues related to a previously sustained and treated displaced fracture of the left third metatarsal, and imaging or clinical assessment confirms malunion. It is used when the focus of the encounter is the management of this malunion, such as planning for corrective surgery or monitoring its impact.

• Ensure documentation clearly states "malunion" and specifies the left third metatarsal.
• Verify the encounter type is "subsequent" and not initial or sequela.
• Always sequence this code with an external cause code if applicable, especially if the malunion is a direct result of the initial injury.