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

This code signifies a fracture of the first bone in the left thumb, closest to the hand, which has shifted out of its normal alignment. The patient is in a later stage of care for this fracture, and the bone fragments are failing to heal together properly, indicating a nonunion.

This code is appropriate for follow-up encounters where a patient is being treated for a previously diagnosed displaced proximal phalanx fracture of the left thumb, and the physician has documented that the fracture is not healing as expected (nonunion). This would typically involve ongoing management, such as further imaging, casting adjustments, or discussion of surgical intervention for the nonunion.

• Ensure documentation clearly specifies "left thumb" and "proximal phalanx."
• Verify that the encounter is for follow-up care and that "nonunion" is explicitly stated or clearly implied by the physician's notes regarding healing status.
• Do not use for initial treatment or routine follow-up of a healing fracture; the "K" seventh character specifically indicates nonunion.