1. Home
  2. ICD-10-CM Codes List
  3. I00–I99
  4. I70-I79
  5. Aortic aneurysm and dissection (I71)

Aortic aneurysm and dissection (I71)

ICD-10 codes for aortic aneurysm and dissection (I71) are used to classify conditions involving abnormal dilation or tearing in the wall of the aorta, the body’s main artery. These codes capture detailed types and locations, such as dissections or aneurysms of thoracic, abdominal, or thoracoabdominal sections of the aorta, specifying whether they are ruptured or not.

The I71 codes cover both aortic aneurysms; bulging or ballooning of the vessel wall; and dissections, which involve a dangerous tear in the aortic lining. For example, I71.00 refers to dissection at an unspecified aortic site and includes terms like “intramural hematoma of aorta” and “aortic valve regurgitation due to dissection.” Dissections are further detailed by precise sites such as ascending aorta (I71.010) or thoracic aorta (I71.01). Similarly, ruptured aneurysms, like a “ruptured thoracic aortic aneurysm” (I71.1), are distinguished from those without rupture (I71.2). These codes assist healthcare professionals and coders in accurately documenting complex aortic conditions, supporting proper diagnosis and treatment documentation.

  • Diseases of the circulatory system (I00–I99)

    • Diseases of arteries, arterioles and capillaries (I70-I79)

        • Aortic aneurysm and dissection (I71)

        • I71 Aortic aneurysm and dissection
        • I71.0 Dissection of aorta
        • I71.00 Dissection of unspecified site of aorta
        • 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
        • I71.02 Dissection of abdominal aorta
        • I71.03 Dissection of thoracoabdominal aorta
        • I71.1 Thoracic aortic aneurysm, ruptured
        • I71.10 Thoracic aortic aneurysm, ruptured, unspecified
        • I71.11 Aneurysm of the ascending aorta, ruptured
        • I71.12 Aneurysm of the aortic arch, ruptured
        • I71.13 Aneurysm of the descending thoracic aorta, ruptured
        • I71.2 Thoracic aortic aneurysm, without rupture
        • I71.20 Thoracic aortic aneurysm, without rupture, unspecified
        • I71.21 Aneurysm of the ascending aorta, without rupture
        • I71.22 Aneurysm of the aortic arch, without rupture
        • I71.23 Aneurysm of the descending thoracic aorta, without rupture
        • I71.3 Abdominal aortic aneurysm, ruptured
        • I71.30 Abdominal aortic aneurysm, ruptured, unspecified
        • I71.31 Pararenal abdominal aortic aneurysm, ruptured
        • I71.32 Juxtarenal abdominal aortic aneurysm, ruptured
        • I71.33 Infrarenal abdominal aortic aneurysm, ruptured
        • I71.4 Abdominal aortic aneurysm, without rupture
        • I71.40 Abdominal aortic aneurysm, without rupture, unspecified
        • I71.41 Pararenal abdominal aortic aneurysm, without rupture
        • I71.42 Juxtarenal abdominal aortic aneurysm, without rupture
        • I71.43 Infrarenal abdominal aortic aneurysm, without rupture
        • I71.5 Thoracoabdominal aortic aneurysm, ruptured
        • I71.50 Thoracoabdominal aortic aneurysm, ruptured, unspecified
        • I71.51 Supraceliac aneurysm of the thoracoabdominal aorta, ruptured
        • I71.52 Paravisceral aneurysm of the thoracoabdominal aorta, ruptured
        • I71.6 Thoracoabdominal aortic aneurysm, without rupture
        • I71.60 Thoracoabdominal aortic aneurysm, without rupture, unspecified
        • I71.61 Supraceliac aneurysm of the thoracoabdominal aorta, without rupture
        • I71.62 Paravisceral aneurysm of the thoracoabdominal aorta, without rupture
        • I71.8 Aortic aneurysm of unspecified site, ruptured
        • I71.9 Aortic aneurysm of unspecified site, without rupture

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • , if applicable:
  • syphilitic aortic aneurysm A52.01
  • traumatic aortic aneurysm S25.09 S35.09

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Aneurysm, Ascending Aorta

An abnormal balloon- or sac-like dilatation in the wall of the ASCENDING AORTA.

Aorta

The main trunk of the systemic arteries.

Aortic Aneurysm

An abnormal balloon- or sac-like dilatation in the wall of AORTA.

Aortic Aneurysm, Abdominal

An abnormal balloon- or sac-like dilatation in the wall of the ABDOMINAL AORTA which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.

Aortic Aneurysm, Thoracic

An abnormal balloon- or sac-like dilatation in the wall of the THORACIC AORTA. This proximal descending portion of aorta gives rise to the visceral and the parietal branches above the aortic hiatus at the diaphragm.

Aortic Aneurysm, Thoracoabdominal

An abnormal balloon- or sac-like dilatation in the wall of ABDOMINAL AORTA at the aortic hiatus.

Aortic Rupture

The tearing or bursting of the wall along any portion of the AORTA, such as thoracic or abdominal. It may result from the rupture of an aneurysm or it may be due to TRAUMA.