Oth disp fx of lower end unsp humer, subs for fx w nonunion

This code signifies a displaced fracture of the distal humerus that is not healing properly (nonunion). It indicates a subsequent encounter, meaning the patient is returning for follow-up care related to this ongoing fracture complication. The "unspecified humerus" implies the laterality (left or right) is not documented.

Apply this code for patients presenting for follow-up appointments, imaging, or treatment related to a previously diagnosed displaced distal humerus fracture that has failed to unite. This would include scenarios where the physician is monitoring the nonunion, discussing surgical intervention for nonunion, or managing complications arising from the nonunion.

• Ensure documentation clearly states "nonunion" and "displaced" for the distal humerus fracture.
• Verify the encounter is "subsequent" and not an initial treatment for the fracture.
• If laterality (left/right) is specified in the documentation, select a more specific code from the S42.49- subcategory.