Disp fx of ant wall of left acetab, subs for fx w nonunion

This code describes a situation where the front portion of the left hip socket (acetabulum) is broken, and the fractured pieces are not in their normal anatomical alignment. Furthermore, this specific code indicates that the fracture has failed to heal properly, and the patient is presenting for follow-up care related to this nonunion.

Use this code for a patient who has previously been treated for a displaced fracture of the anterior wall of the left acetabulum, but the bone fragments have not united. This applies during subsequent encounters for ongoing management, evaluation, or treatment of the nonunion, such as for surgical planning, cast changes, or monitoring healing progress.

• Ensure documentation clearly specifies "displaced" and "anterior wall" of the left acetabulum.
• Confirm the encounter is for a "nonunion" of the fracture, not initial treatment or routine healing.
• Always sequence this code after any associated external cause codes, if applicable.