Nondisp fx of prox phalanx of l thm, subs for fx w malunion

This code describes a situation where a fracture of the proximal phalanx of the left thumb, initially nondisplaced, has healed improperly, resulting in a malunion. This improper healing can lead to functional impairment and pain in the thumb.

This code is appropriate for follow-up encounters where a patient is being treated for complications arising from a previously sustained, nondisplaced fracture of the left thumb's proximal phalanx that has healed in a misaligned position. It would be used for ongoing management, evaluation of function, or planning for corrective procedures related to the malunion.

• Ensure documentation clearly states "malunion" as the complication of the fracture.
• Verify the fracture was initially nondisplaced and located in the proximal phalanx of the left thumb.
• This code is for subsequent encounters, not the initial treatment of the fracture.