Unsp fx lower end of r humerus, subs for fx w nonunion

This code signifies a previously diagnosed, unspecified fracture of the distal end of the right humerus that has failed to heal properly. "Nonunion" indicates that the bone fragments have not united after a sufficient period, often requiring further intervention.

Apply this code when a patient presents for follow-up care, treatment, or evaluation of a right distal humeral fracture that has been identified as a nonunion. This includes scenarios where surgical intervention for the nonunion is being planned or has already occurred during the current encounter.

• Always ensure documentation clearly states "nonunion" and specifies the right humerus and its lower end.
• This code requires a 7th character "K" for subsequent encounter with nonunion; do not use for initial treatment or routine follow-up without nonunion.
• Pair with external cause codes (e.g., V00-Y99) and place of occurrence codes (e.g., Y90-Y99) if the original injury cause is still relevant and documented.