1. I71 Aortic aneurysm and dissection

    1. I71.0 Dissection of aorta

      1. I71.00 Dissection of unspecified site of aorta

      2. I71.01 Dissection of thoracic aorta

        • I71.010 Dissection of ascending aorta
        • I71.011 Dissection of aortic arch
        • I71.012 Dissection of descending thoracic aorta
        • I71.019 Dissection of thoracic aorta, unspecified
      3. I71.02 Dissection of abdominal aorta

      4. I71.03 Dissection of thoracoabdominal aorta

    2. I71.1 Thoracic aortic aneurysm, ruptured

      1. I71.10 Thoracic aortic aneurysm, ruptured, unspecified

      2. I71.11 Aneurysm of the ascending aorta, ruptured

      3. I71.12 Aneurysm of the aortic arch, ruptured

      4. I71.13 Aneurysm of the descending thoracic aorta, ruptured

    3. I71.2 Thoracic aortic aneurysm, without rupture

      1. I71.20 Thoracic aortic aneurysm, without rupture, unspecified

      2. I71.21 Aneurysm of the ascending aorta, without rupture

      3. I71.22 Aneurysm of the aortic arch, without rupture

      4. I71.23 Aneurysm of the descending thoracic aorta, without rupture

    4. I71.3 Abdominal aortic aneurysm, ruptured

      1. I71.30 Abdominal aortic aneurysm, ruptured, unspecified

      2. I71.31 Pararenal abdominal aortic aneurysm, ruptured

      3. I71.32 Juxtarenal abdominal aortic aneurysm, ruptured

      4. I71.33 Infrarenal abdominal aortic aneurysm, ruptured

    5. I71.4 Abdominal aortic aneurysm, without rupture

      1. I71.40 Abdominal aortic aneurysm, without rupture, unspecified

      2. I71.41 Pararenal abdominal aortic aneurysm, without rupture

      3. I71.42 Juxtarenal abdominal aortic aneurysm, without rupture

      4. I71.43 Infrarenal abdominal aortic aneurysm, without rupture

    6. I71.5 Thoracoabdominal aortic aneurysm, ruptured

      1. I71.50 Thoracoabdominal aortic aneurysm, ruptured, unspecified

      2. I71.51 Supraceliac aneurysm of the thoracoabdominal aorta, ruptured

      3. I71.52 Paravisceral aneurysm of the thoracoabdominal aorta, ruptured

    7. I71.6 Thoracoabdominal aortic aneurysm, without rupture

      1. I71.60 Thoracoabdominal aortic aneurysm, without rupture, unspecified

      2. I71.61 Supraceliac aneurysm of the thoracoabdominal aorta, without rupture

      3. I71.62 Paravisceral aneurysm of the thoracoabdominal aorta, without rupture

    8. I71.8 Aortic aneurysm of unspecified site, ruptured

      Inclusion term(s):

      • Rupture of aorta NOS
    9. I71.9 Aortic aneurysm of unspecified site, without rupture

      Inclusion term(s):

      • Aneurysm of aorta
      • Dilatation of aorta
      • Hyaline necrosis of aorta
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.