Nondisp fx of distal phalanx of thmb, subs for fx w malunion

This code signifies a previously sustained fracture of the furthest bone in the thumb, which is now healing incorrectly (malunion). The fracture itself was not displaced at the time of injury, meaning the bone fragments remained in their normal alignment. This code is used during follow-up care for this specific complication.

This code is appropriate for subsequent encounters when a patient presents with a documented malunion of a previously nondisplaced distal phalanx fracture of the thumb. This would include visits for assessment, monitoring, or management of the malunion, such as considering surgical correction or physical therapy. It should be used after the initial treatment phase for the acute fracture.

• Always confirm documentation specifies "nondisplaced" and "malunion" for the distal phalanx of the thumb.
• Ensure the encounter is a "subsequent encounter" for the fracture, not the initial treatment.
• Verify laterality (left, right, or unspecified) is accurately reflected in the documentation; this specific code is for "unspecified thumb."