Disp fx of nk of 3rd MC bone, l hand, subs for fx w nonunion

This code indicates a fracture of the neck of the third metacarpal bone in the left hand that is no longer in its anatomical position. Crucially, the fracture has failed to heal properly, resulting in a nonunion, and the patient is presenting for follow-up care related to this ongoing issue.

Apply this code when a patient with a previously diagnosed and treated displaced fracture of the left third metacarpal neck presents for an encounter where the primary focus is the management of a confirmed nonunion. This would include visits for evaluation of nonunion, planning for revision surgery, or ongoing conservative management of the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the "left" hand and "third metacarpal neck."
• This "K" subsequent encounter code is used for routine healing, malunion, and nonunion.
• Verify laterality (left hand) and the specific bone (third metacarpal) are explicitly documented.