Nondisp fx of prox phalanx of finger, subs for fx w nonunion

This code signifies a fracture of the proximal phalanx in any finger other than the thumb, where the bone fragments remain in their normal anatomical alignment. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and "nonunion" specifies that the fracture has failed to heal completely after a reasonable period.

Use this code for patients presenting for ongoing management of a previously diagnosed nondisplaced proximal phalanx fracture of a finger (excluding the thumb) that has not healed. This applies to situations such as cast changes, physical therapy, or surgical planning for nonunion. It would not be used for the initial diagnosis or for a healed fracture.

• Always confirm the specific phalanx (proximal, middle, distal) and the affected finger.
• Ensure documentation clearly states "nondisplaced" and "nonunion" for accurate code assignment.
• Pair with an external cause code if the etiology of the fracture is known and relevant to the encounter.