Unsp fx low end l ulna, subs for opn fx type I/2 w nonunion

This code signifies a non-healing fracture of the lower part of the left ulna, which was initially an open fracture (Type I or II). The patient is currently in a subsequent phase of care, indicating ongoing treatment for this specific complication.

Apply this code when documenting follow-up care for a patient with a previously diagnosed open fracture (Type I or II) of the distal left ulna that has failed to unite. This would include scenarios where the patient is undergoing further surgical intervention, casting, or other management for the nonunion.

• Always confirm the laterality (left) and the specific bone (ulna) and location (lower end).
• Ensure the original injury was an open fracture, specifically Type I or II, and that nonunion is confirmed.
• This code is for subsequent encounters; an initial encounter for the nonunion would use a different code.