MCMedicalCodingSoftware
I77.812

I77.812: Thoracoabdominal aortic ectasia

Billable / specific codeICD-10-CM

I77.812 is a billable, specific ICD-10-CM code for thoracoabdominal aortic ectasia. It is valid for submission on a claim.

Check I77.812 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above I77.812

A category’s note binds every code beneath it.

Written on I77.81: Aortic ectasia

  • aortic aneurysm and dissection (I71.-)

Excludes2 inherited from the categories above I77.812

Not part of this code, but both may be coded when both are present.

Written on I77: Other disorders of arteries and arterioles

  • collagen (vascular) diseases (M30-M36)
  • hypersensitivity angiitis (M31.0)
  • pulmonary artery (I28.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I77.812 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
  • A56682Billing and Coding: Diagnostic Abdominal Aortography and Renal Angiography
  • A56697Billing and Coding: Non-Invasive Vascular Studies
  • A56747Billing and Coding: Magnetic Resonance Angiography (MRA)

Alphabetic index entries that lead here

  • Ectasia, ectasis›aorta›thoracoabdominal

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I77.81

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.