Unsp fracture of unsp ilium, subs for fx w nonunion

This code signifies a follow-up encounter for a fracture of the ilium, where the specific location of the fracture within the ilium is not documented, and the laterality (left or right) is also unspecified. The key characteristic for using this code is the presence of a nonunion, meaning the bone fragments have failed to heal together after the initial fracture.

Use this code for patients presenting for ongoing management or evaluation of an iliac fracture that has not healed properly, and the exact site within the ilium or its laterality is not specified in the medical record. This would apply to situations where a previous iliac fracture, regardless of initial treatment, has been diagnosed with nonunion during a subsequent visit.

• Ensure documentation clearly states "nonunion" of an iliac fracture.
• Only use this code when the specific part of the ilium and laterality are truly unspecified.
• Verify that this is a subsequent encounter, not the initial treatment for the fracture.