Displ assoc transv/post fx l acetab, subs for fx w nonunion

This code signifies a fracture of the left acetabulum (the hip socket) that involves both the transverse and posterior columns, with the bone fragments being out of their normal alignment. It specifically indicates that the patient is in a subsequent phase of care for this injury, and the fracture has failed to heal properly (nonunion).

Use this code for follow-up encounters with a patient who previously sustained a displaced transverse-posterior fracture of the left acetabulum, and imaging or clinical assessment confirms that the fracture has not united. This applies to ongoing management, treatment of the nonunion, or monitoring its progression.

• Ensure documentation clearly states "nonunion" for the fracture.
• Verify the laterality (left) and the specific fracture pattern (displaced transverse-posterior acetabulum).
• Confirm this is a subsequent encounter, not the initial treatment for the acute fracture.