Aortic ectasia, unspecified site

This code describes a localized or diffuse dilation of the aorta that is not classified as an aneurysm. It indicates an abnormal widening of the aortic vessel without meeting the specific criteria for an aneurysm, and the exact location of this ectasia is not specified in the medical record.

Assign this code when documentation indicates "aortic ectasia" without further specification of the anatomical site (e.g., ascending, descending, abdominal aorta) and without meeting the size criteria for an aneurysm. This code is appropriate when the physician explicitly diagnoses aortic ectasia but does not provide details regarding its precise location.

• Do not use this code if the documentation specifies the anatomical site of the aortic ectasia; instead, use a more specific code from the I77.81- series.
• Distinguish carefully between aortic ectasia and aortic aneurysm; ectasia implies dilation without meeting the aneurysm threshold (typically 1.5 times the normal diameter).
• Query the provider for a more specific site if possible, as this code represents an unspecified location.