2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Aortic aneurysm and dissection
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I71: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Code First

The underlying condition named in the note is sequenced before this code.

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

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I71, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I71: they are not reported together with it, unless the two conditions are unrelated.

  • I77.81 Aortic ectasia
    aortic aneurysm and dissection (I71.-)

Excludes2 1

These codes carry an Excludes2 note naming I71: its condition is not part of those codes, and both may be reported when the patient has both.

  • I72 Other aneurysm
    aneurysm (of) aorta (I71.-)

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I71Overview

What is the ICD-10 code for aortic aneurysm and dissection?

I71 is the ICD-10-CM category for aortic aneurysm and dissection, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

What is coded first with I71?

The Code First note reads: , if applicable: syphilitic aortic aneurysm (A52.01); traumatic aortic aneurysm (S25.09, S35.09). When one of these applies, it is sequenced before I71.