Disp fx of distal phalanx of thmb, subs for fx w nonunion

This code signifies a fracture of the furthest bone in an unspecified thumb, which has shifted out of its normal alignment. The fracture is not healing properly, indicating a nonunion, and the patient is presenting for follow-up care after the initial treatment.

This code is appropriate for subsequent encounters when a patient is being managed for a previously diagnosed displaced distal phalanx fracture of the thumb that has failed to unite. This includes visits for ongoing assessment, treatment adjustments, or preparation for further intervention related to the nonunion.

• Ensure documentation clearly specifies "nonunion" and "subsequent encounter" for the fracture.
• Verify the fracture is of the distal phalanx and the thumb.
• Do not use for initial treatment or for malunion (which has a different code).