Disp fx of proximal phalanx of r thm, subs for fx w nonunion

This code describes a situation where the patient has a fracture of the first bone in the right thumb, closest to the hand, which is not properly aligned. Furthermore, the fracture has failed to heal after a previous treatment attempt, indicating a nonunion. This code is used during follow-up care for this specific complication.

Apply this code when a patient presents for ongoing management of a previously treated, displaced proximal phalanx fracture of the right thumb that has not united. This would include scenarios such as surgical intervention for the nonunion, casting changes, or physical therapy related to the nonunion. It is appropriate for any encounter after the initial treatment of the fracture, where nonunion is the primary concern.

• Requires a seventh character of 'K' to indicate a subsequent encounter for a fracture with nonunion.
• Ensure documentation clearly states "nonunion" and specifies the right thumb's proximal phalanx.
• Do not use for initial treatment of the fracture or for malunion (improper healing in a deformed position).