Disp fx of post column of l acetab, subs for fx w nonunion

This code signifies a fracture affecting the posterior column of the left acetabulum, specifically the ilioischial portion, where the bone fragments are no longer in their anatomical alignment. This particular instance represents a follow-up encounter for a fracture that has failed to heal properly, indicating a nonunion.

Apply this code when documenting subsequent care for a patient with a previously diagnosed displaced posterior column acetabular fracture on the left side, and the physician explicitly states or implies that the fracture has not united. This would be used for ongoing management, such as preparing for revision surgery or monitoring the nonunion.

• Ensure documentation clearly specifies "nonunion" for the fracture.
• Verify the laterality (left) and the specific column (posterior, ilioischial) are documented.
• Confirm this is a subsequent encounter, not the initial treatment of the fracture.