Nondisp Zone III fracture of sacrum, subs for fx w nonunion

This code signifies a sacral fracture located in Zone III, which involves the sacral ala and sacroiliac joint, that is not displaced. The "nonunion" aspect indicates that the fracture has failed to heal completely after the expected recovery period, and this encounter is for ongoing management of that nonunion.

Apply this code for follow-up encounters where a patient is being treated for a previously diagnosed, nondisplaced Zone III sacral fracture that has not united. This includes visits for continued conservative management, evaluation for surgical intervention for nonunion, or monitoring the progress of nonunion treatment.

• Ensure documentation clearly specifies "nonunion" and not just delayed healing.
• Verify the fracture location is indeed Zone III (sacral ala/SI joint) and nondisplaced.
• This "K" seventh character indicates a subsequent encounter for a fracture with nonunion, so it should not be used for initial treatment.