2026 ICD-10-CM Diagnosis Code I71Aortic aneurysm and dissection

ICD-10-CM Codes›I00–I99›I70-I79›I71

ICD-10-CM I71
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I71 is a non-billable ICD-10-CM category code for aortic aneurysm and dissection, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I71.00, I71.010, I71.011, and I71.012.

Code Identity

ICD-10-CM Code
I71
Billable Status
No — Non-Billable Category
Code Describes
Aortic aneurysm and dissection
Chapter
I70-I79
Diseases of arteries, arterioles and capillaries

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI71Aortic aneurysm and dissection
This CodeI71Aortic aneurysm and dissection

Specific Coding for Aortic aneurysm and dissectionOverview

Non-specific codes like I71 require more characters. Use one of these billable codes instead:

  • 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

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code First

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

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I71Overview

Is I71 (Aortic aneurysm and dissection) a billable code?

No. This is a category header that groups the codes for aortic aneurysm and dissection, and headers cannot be submitted on claims. Claims for aortic aneurysm and dissection need a more specific code from this category, such as I71.00, I71.010, and I71.011.