I71.2Thoracic aortic aneurysm, without rupture

I71.2 is the ICD-10-CM diagnosis code for thoracic aortic aneurysm, without rupture. It belongs to category I71 (aortic aneurysm and dissection), block I70-I79 (diseases of arteries, arterioles and capillaries) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

Within I71, choose I71.2 (Thoracic aortic aneurysm, without rupture) only when documentation doesn't support a more specific option: dissection of aorta (I71.0), thoracic aortic aneurysm, ruptured (I71.1), abdominal aortic aneurysm, ruptured (I71.3), abdominal aortic aneurysm, without rupture (I71.4), thoracoabdominal aortic aneurysm, ruptured (I71.5), thoracoabdominal aortic aneurysm, without rupture (I71.6), aortic aneurysm of unspecified site, ruptured (I71.8) and aortic aneurysm of unspecified site, without rupture (I71.9).

To report this condition, pick the subcode that matches the documentation: I71.20 (unspecified), I71.21 (rupture), I71.22 (rupture) and I71.23 (rupture).

Code first , if applicable: syphilitic aortic aneurysm (A52.01) and traumatic aortic aneurysm (S25.09, S35.09).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2023 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 441.2 (thoracic aneurysm without mention of rupture).