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HCC 107 and HCC 108 – Aneurysm

This month, we are focusing on aortic aneurysms.

Patients diagnosed with an aneurysm may not need surgical intervention right away but could be defined clinically as “under surveillance” for an active aneurysm. The diagnosis code should reflect the active condition code from series I71.1–I71.9.

Types of aortic aneurysms specified in ICD-10-CM include:

  • Thoracic aortic aneurysm
  • Abdominal aortic aneurysm
  • Thoracoabdominal aneurysm

Below is the listing of ICD-10 codes for reporting aortic aneurysms (notice location and rupture vs. without rupture are defined by the code):

ICD-10 Code Description
I71.1 Thoracic aortic aneurysm, ruptured
I71.2 Thoracic aortic aneurysm, without rupture
I71.3 Abdominal aortic aneurysm, ruptured
I71.4 Abdominal aortic aneurysm, without rupture
I71.5 Thoracoabdominal aortic aneurysm, ruptured
I71.6 Thoracoabdominal aortic aneurysm, without rupture
I71.8 Aortic aneurysm of unspecified site, ruptured
I71.9 Aortic aneurysm of unspecified site, without rupture

ICD-10 code Z86.79: Report personal history of other diseases of the circulatory system if an aneurysm has been surgically repaired.

If you have questions or would like to talk more about coding for this or any other chronic conditions, contact us at


Resources: ICD-10-CM Official Guidelines for Coding and Reporting FY 2018