Nondisp avulsion fx right ischium, subs for fx w nonunion

This code signifies a fracture of the right ischium where a piece of bone has been pulled away by a tendon or ligament, but the bone fragments remain in their normal alignment. The patient is in a subsequent phase of care for this injury, and the fracture has failed to heal properly, indicating a nonunion.

Apply this code when documenting ongoing treatment for a previously diagnosed avulsion fracture of the right ischium that has not united. This is appropriate for follow-up visits, cast changes, or surgical interventions addressing the nonunion of the fracture. It should be used after the initial encounter for the injury.

• Ensure documentation clearly states "nonunion" and specifies the right ischium.
• Verify the fracture is explicitly described as "nondisplaced avulsion."
• Confirm this is a subsequent encounter, not the initial treatment for the fracture.