Disp fx of nk of 1st MC bone, unsp hand, 7thK

This code signifies a fracture of the neck of the first metacarpal bone (thumb) that has become displaced, meaning the bone fragments are not properly aligned. It specifically indicates that the fracture is not healing as expected, leading to a nonunion, and the patient is presenting for follow-up care related to this ongoing issue.

This code is appropriate for subsequent encounters when a patient is being treated for a previously diagnosed displaced fracture of the first metacarpal neck that has failed to unite. This would include visits for ongoing management, evaluation of nonunion, or planning for further intervention. Do not use for initial treatment or routine follow-up of a healing fracture.

• Ensure documentation clearly states "nonunion" and "displaced" for the first metacarpal neck fracture.
• Verify the encounter is "subsequent" and not an initial treatment for the fracture.
• Laterality (left/right hand) is unspecified with this code; if known, a more specific code should be sought.