Disp fx of unsp ulna styloid pro, 7thN

This code describes a nonunion of a displaced fracture of the styloid process of the ulna, which was initially an open fracture classified as type IIIA, IIIB, or IIIC. Nonunion indicates that the bone has failed to heal after a previous surgical or non-surgical intervention.

This code is used for follow-up encounters when a patient presents with a previously diagnosed open ulna styloid fracture (type IIIA, IIIB, or IIIC) that has failed to unite. It is appropriate when the physician documents ongoing treatment for the nonunion, such as casting, bracing, or planning for further surgical intervention.

• Ensure documentation clearly specifies "nonunion" and the initial open fracture type (IIIA, IIIB, or IIIC).
• Verify the fracture is of the ulna styloid process, not another part of the ulna or radius.
• This code is for subsequent encounters; an initial encounter would use a different code from the S52.61- series.