I71.9 — Aortic aneurysm of unspecified site, without rupture
I71.9 is a billable, specific ICD-10-CM code for aortic aneurysm of unspecified site, without rupture. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Aneurysm of aorta
- Dilatation of aorta
- Hyaline necrosis of aorta
Risk adjustment
I71.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I71.9 is named in 11 Medicare coverage policies — 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56476Billing and Coding: Cardiac Radionuclide Imaging
- A56722Billing and Coding: Intraoperative Neurophysiological Testing
How I71.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I71.9.
- Fernell's disease(aortic aneurysm)
- Aneurysm›aorta, aortic(nonsyphilitic)
- Aneurysm›cylindroid(aorta)
- Disease, diseased›Fernels'(aortic aneurysm)
- Aneurysm›aorta, aortic›arteriosclerotic
- Aneurysm›aorta, aortic›descending
Related codes at this level
Codes that share I71. If I71.9 is not quite right, the correct code is usually one of these.
- I71.0Dissection of aorta
- I71.1Thoracic aortic aneurysm, ruptured
- I71.2Thoracic aortic aneurysm, without rupture
- I71.3Abdominal aortic aneurysm, ruptured
- I71.4Abdominal aortic aneurysm, without rupture
- I71.5Thoracoabdominal aortic aneurysm, ruptured
- I71.6Thoracoabdominal aortic aneurysm, without rupture
- I71.8Aortic aneurysm of unspecified site, ruptured
Questions about I71.9
- Is I71.9 a billable ICD-10-CM code?
- Yes. I71.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I71.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).