Oth fx low end l ulna, 7thN

This code describes a specific type of fracture involving the lower end of the left ulna that is not further specified as a styloid or other named fracture. It indicates that the fracture is an open fracture of Gustilo-Anderson type IIIA, IIIB, or IIIC, and that the patient is in a subsequent encounter phase of care with evidence of nonunion. Nonunion signifies a failure of the bone to heal after a reasonable period.

This code is appropriate for documenting follow-up care for a patient with a previously diagnosed open fracture of the distal left ulna that has failed to unite. This includes scenarios where the patient is undergoing treatment for the nonunion, such as revision surgery, bone grafting, or continued conservative management. It is used after the initial healing phase has passed without successful union.

• Ensure documentation clearly specifies "nonunion" and the Gustilo-Anderson open fracture type (IIIA, IIIB, or IIIC).
• Verify laterality (left ulna) is accurately documented.
• This code is for subsequent encounters; an initial encounter code would be used for the acute injury.