Displaced dome fx unsp acetabulum, subs for fx w nonunion

This code signifies a fracture of the dome of the acetabulum, the socket of the hip joint, where the bone fragments are no longer in their anatomical alignment. The "subsequent encounter" indicates that the patient is receiving follow-up care for this previously diagnosed injury. The "nonunion" specifies that the fracture has failed to heal completely after a reasonable period.

Apply this code when documenting ongoing treatment for a displaced acetabular dome fracture that has not united. This includes scenarios such as surgical intervention for nonunion, casting or bracing adjustments, or physical therapy aimed at managing the non-healing fracture. It is used after the initial treatment of the acute fracture.

• Ensure documentation clearly states "nonunion" and "displaced" for the acetabular dome fracture.
• Verify that the encounter is for follow-up care, not the initial treatment of the acute fracture.
• Always sequence this code after any associated external cause codes, if applicable.