Fx unsp tarsal bone(s) of unsp foot, subs for fx w malunion

This code signifies a fracture of an unspecified tarsal bone in an unspecified foot that has previously been treated but is now presenting with malunion. Malunion indicates that the bone has healed in an anatomically incorrect or deformed position, which can lead to functional impairment and pain.

Apply this code when a patient presents for follow-up care of a tarsal bone fracture that has healed improperly, resulting in a malunion. This would typically be documented by an orthopedic surgeon or other treating physician after imaging confirms the malunion. It is used for subsequent encounters after the initial treatment of the fracture.

• Ensure documentation clearly states "malunion" and specifies the tarsal bone, even if unspecified in the code.
• Verify this is a subsequent encounter for the fracture, not the initial treatment.
• Always look for laterality (left/right foot) if specified in the medical record, as more specific codes may exist.