Disp fx of base of 4th MC bone, r hand, 7thK

This code signifies a break at the base of the fourth metacarpal bone in the right hand, where the bone fragments are no longer in their normal alignment. The patient is in a later stage of treatment, and the fracture has failed to heal properly, indicating a nonunion.

Apply this code for follow-up encounters when a patient with a previously diagnosed displaced fracture of the right fourth metacarpal base presents with evidence of nonunion. This would include situations where surgical intervention for nonunion is being planned or evaluated, or during ongoing management of the unhealed fracture.

• Always confirm laterality (right hand) and the specific bone (fourth metacarpal base).
• Ensure documentation clearly states "displaced" and "nonunion" for accurate code assignment.
• This code is for subsequent encounters; an initial encounter would use a different seventh character.