2020 ICD-10-CM Diagnosis Code I71.9

Aortic aneurysm of unspecified site, without rupture

    2016 2017 2018 2019 2020 Billable/Specific Code
  • I71.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM I71.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of I71.9 - other international versions of ICD-10 I71.9 may differ.
Applicable To
  • Aneurysm of aorta
  • Dilatation of aorta
  • Hyaline necrosis of aorta
The following code(s) above I71.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to I71.9:
  • I00-I99
    2020 ICD-10-CM Range I00-I99

    Diseases of the circulatory system

    Type 2 Excludes
    • 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.-)
    Diseases of the circulatory system
  • I71
    ICD-10-CM Diagnosis Code I71

    Aortic aneurysm and dissection

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Aortic aneurysm and dissection
Approximate Synonyms
  • Aneurysm of aorta
  • Aneurysm of descending aorta
  • Aortic aneurysm
  • Descending aorta aneurysm
  • Penetrating ulcer of aorta
  • Penetrating ulcer of artery
Clinical Information
  • A sac formation resulting from the localized dilatation of the wall of the aorta.
  • An abnormal balloon- or sac-like dilatation in the wall of aorta.
  • Most aneurysms -- abnormal bulges or "ballooning" in the wall of an artery -- occur in the aorta. The aorta is the main artery that carries blood from the heart to the rest of the body. There are two types of aortic aneurysm:
    • thoracic aortic aneurysms occur in the part of the aorta running through the chest.
    • abdominal aortic aneurysms occur in the part of the aorta running through the abdomen.
    because aneurysms can develop and become large before causing any symptoms, it is important to look for them in people who are at high risk. Ultrasound screening for abdominal aortic aneurysms is recommended for men who have ever smoked and are between the ages of 65 and 75. Medicines and surgery are the two main treatments for aneurysms.
  • Sac formed by the dilatation of the wall of the aorta.
ICD-10-CM I71.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 299 Peripheral vascular disorders with mcc
  • 300 Peripheral vascular disorders with cc
  • 301 Peripheral vascular disorders without cc/mcc

Convert I71.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to I71.9:

ICD-10-CM Codes Adjacent To I71.9
I71.01 Dissection of thoracic aorta
I71.02 Dissection of abdominal aorta
I71.03 Dissection of thoracoabdominal aorta
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
I72 Other aneurysm
I72.0 Aneurysm of carotid artery
I72.1 Aneurysm of artery of upper extremity
I72.2 Aneurysm of renal artery
I72.3 Aneurysm of iliac artery
I72.4 Aneurysm of artery of lower extremity
I72.5 Aneurysm of other precerebral arteries
I72.6 Aneurysm of vertebral artery
I72.8 Aneurysm of other specified arteries
I72.9 Aneurysm of unspecified site

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.