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  6. 2026 ICD-10-CM Code I71

2026 ICD-10-CM Diagnosis Code I71

Aortic aneurysm and dissection

ICD-10-CM Code:
I71
ICD-10 Code for:
Aortic aneurysm and dissection
Is Billable?
Not Valid for Submission
Code Navigator:

I71 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of aortic aneurysm and dissection. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Aortic aneurysm and dissection

Non-specific codes like I71 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for aortic aneurysm and dissection:

  • I71.0 for Dissection of aorta

  • Use I71.00 for Dissection of unspecified site of aorta

  • I71.01 for Dissection of thoracic aorta

  • Use I71.02 for Dissection of abdominal aorta

  • Use I71.03 for Dissection of thoracoabdominal aorta

  • I71.1 for Thoracic aortic aneurysm, ruptured

  • Use I71.10 for Thoracic aortic aneurysm, ruptured, unspecified

  • Use I71.11 for Aneurysm of the ascending aorta, ruptured

  • Use I71.12 for Aneurysm of the aortic arch, ruptured

  • Use I71.13 for Aneurysm of the descending thoracic aorta, ruptured

  • I71.2 for Thoracic aortic aneurysm, without rupture

  • Use I71.20 for Thoracic aortic aneurysm, without rupture, unspecified

  • Use I71.21 for Aneurysm of the ascending aorta, without rupture

  • Use I71.22 for Aneurysm of the aortic arch, without rupture

  • Use I71.23 for Aneurysm of the descending thoracic aorta, without rupture

  • I71.3 for Abdominal aortic aneurysm, ruptured

  • Use I71.30 for Abdominal aortic aneurysm, ruptured, unspecified

  • Use I71.31 for Pararenal abdominal aortic aneurysm, ruptured

  • Use I71.32 for Juxtarenal abdominal aortic aneurysm, ruptured

  • Use I71.33 for Infrarenal abdominal aortic aneurysm, ruptured

  • I71.4 for Abdominal aortic aneurysm, without rupture

  • Use I71.40 for Abdominal aortic aneurysm, without rupture, unspecified

  • Use I71.41 for Pararenal abdominal aortic aneurysm, without rupture

  • Use I71.42 for Juxtarenal abdominal aortic aneurysm, without rupture

  • Use I71.43 for Infrarenal abdominal aortic aneurysm, without rupture

  • I71.5 for Thoracoabdominal aortic aneurysm, ruptured

  • Use I71.50 for Thoracoabdominal aortic aneurysm, ruptured, unspecified

  • Use I71.51 for Supraceliac aneurysm of the thoracoabdominal aorta, ruptured

  • Use I71.52 for Paravisceral aneurysm of the thoracoabdominal aorta, ruptured

  • I71.6 for Thoracoabdominal aortic aneurysm, without rupture

  • Use I71.60 for Thoracoabdominal aortic aneurysm, without rupture, unspecified

  • Use I71.61 for Supraceliac aneurysm of the thoracoabdominal aorta, without rupture

  • Use I71.62 for Paravisceral aneurysm of the thoracoabdominal aorta, without rupture

  • Use I71.8 for Aortic aneurysm of unspecified site, ruptured

  • Use I71.9 for Aortic aneurysm of unspecified site, without rupture

Code Classification

  • Diseases of the circulatory system
    I00–I99
    • Diseases of arteries, arterioles and capillaries
      I70-I79
      • Aortic aneurysm and dissection
        I71

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Code First

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

Patient Education


Aortic Aneurysm

An aneurysm is a bulge or "ballooning" in the wall of an artery. Arteries are blood vessels that carry oxygen-rich blood from the heart to other parts of the body. If an aneurysm grows large, it can burst and cause dangerous bleeding or even death.

Most aneurysms are in the aorta, the main artery that runs from the heart through the chest and abdomen.

There are two types of aortic aneurysm:

  • Thoracic aortic aneurysms (TAA) - these occur in the part of the aorta running through the chest
  • Abdominal aortic aneurysms (AAA) - these occur in the part of the aorta running through the abdomen

Most aneurysms are found during tests done for other reasons. Some people are at high risk for aneurysms. It is important for them to get screening, because aneurysms can develop and become large before causing any symptoms. Screening is recommended for people between the ages of 65 and 75 if they have a family history, or if they are men who have smoked. Doctors use imaging tests to find aneurysms. Medicines and surgery are the two main treatments.

NIH: National Heart, Lung, and Blood Institute


[Learn More in MedlinePlus]

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.