Nondisp fx of post wall of l acetab, subs for fx w nonunion

This code signifies a fracture of the back portion of the left hip socket that has not shifted from its original position. The patient is in a later stage of care for this injury, and the fracture has failed to heal properly, indicating a nonunion.

This code is appropriate for follow-up encounters where a patient is being treated for a previously diagnosed nondisplaced posterior wall acetabular fracture on the left side, and medical documentation confirms that the bone fragments have not united. This would include situations where surgical intervention for nonunion is being planned or has been performed, or during ongoing conservative management for the nonunion.

• Ensure documentation explicitly states "nonunion" for the fracture.
• Verify the laterality (left) and the specific anatomical site (posterior wall of acetabulum).
• Confirm the fracture was initially nondisplaced; if displaced, a different code would be necessary.