I77.812
BillableThoracoabdominal aortic ectasia
HCC Category Mapping
V24HCC 108 — Vascular Disease
0.297ESRDHCC 108 — Vascular Disease
0.000What This Code Means
An abnormal widening of the aorta that extends from the chest through the abdomen, affecting both thoracic and abdominal portions.
Coding Tips
- •Ensure documentation specifies involvement of both thoracic and abdominal segments
- •Monitor for progression and associated complications such as aortic regurgitation
Clinical Significance
Thoracoabdominal aortic ectasia involves mild dilation of both the thoracic and abdominal segments of the aorta, reflecting more widespread vascular disease than isolated segment involvement. This condition requires comprehensive surveillance and carries increased risk of progression to thoracoabdominal aneurysm. The extent of involvement reflects greater patient complexity for risk adjustment purposes.
Documentation Requirements
- ✓Imaging confirmation showing dilation of both thoracic and abdominal aortic segments
- ✓Measurements of both thoracic and abdominal aortic diameters
- ✓Documentation that dilation is sub-aneurysmal in both segments
- ✓Comprehensive surveillance plan with appropriate imaging modality and intervals
- ✓Assessment of underlying connective tissue disorders or vasculitis
- ✓Blood pressure management and cardiovascular risk reduction plan
Commonly Confused Codes
I77.810 — Thoracic aortic ectasia: use when only thoracic segment is involvedI77.811 — Abdominal aortic ectasia: use when only abdominal segment is involvedI71.6 — Thoracoabdominal aortic aneurysm without rupture: use when dilation meets aneurysm criteriaI77.819 — Aortic ectasia, unspecified site: less specific option