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

This code describes a sacral fracture located in Zone II, which involves the sacral foramina. The fracture is currently not aligned, and the patient is presenting for follow-up care related to the ongoing failure of the bone to heal properly.

Apply this code when a patient with a previously diagnosed nondisplaced Zone II sacral fracture is seen for subsequent treatment of a nonunion. This includes visits for monitoring, cast changes, or preparation for further intervention due to the persistent lack of healing.

• Requires a seventh character "K" to indicate a subsequent encounter for a fracture with nonunion.
• Ensure documentation clearly states the fracture is in Zone II and is nondisplaced.
• Distinguish from initial encounters or subsequent encounters for routine healing (which would use different seventh characters).