Oth fx fifth MC bone, left hand, subs for fx w nonunion

This code signifies a fracture of the fifth metacarpal bone in the left hand, which is not a Boxer's fracture, that has failed to heal properly after an initial treatment. The patient is presenting for follow-up care or management of this persistent nonunion.

Use this code when documenting a patient visit for ongoing treatment, evaluation, or management of a previously diagnosed left fifth metacarpal fracture that has developed a nonunion. This applies to situations where the fracture has not united after the expected healing period and requires further intervention.

• Ensure documentation clearly specifies the left hand and the fifth metacarpal bone.
• Verify that the encounter is for a subsequent visit related to the fracture and that nonunion is explicitly documented.
• Do not use this code for initial fracture treatment or for malunion, which is a different complication.