Displaced avulsion fx right ischium, subs for fx w nonunion

This code signifies a fracture where a piece of the right ischium has been pulled away from the main bone by a tendon or ligament, and the fractured fragments are not in their normal anatomical alignment. Furthermore, the bone has failed to heal properly after an initial treatment, and the patient is presenting for ongoing care related to this nonunion.

Use this code for a patient presenting for follow-up care, such as cast changes, physical therapy, or surgical planning, for a previously diagnosed avulsion fracture of the right ischium that has been documented as displaced and is now complicated by nonunion. This applies when the initial treatment has failed to achieve bony union.

• Ensure documentation explicitly states "nonunion" and "displaced" for the right ischial avulsion fracture.
• Verify this is a "subsequent encounter" for the fracture, not the initial treatment.
• Always review operative reports and imaging studies to confirm fracture type, displacement, and nonunion status.