Aortic aneurysm and dissection
In Diseases of arteries, arterioles and capillaries (I70-I79), chapter 9: Diseases of the Circulatory System
31 billable codes under I71: 19 are an MCC; 19 map to HCC 264 (Vascular Disease with Complications).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers hypertension with heart and kidney disease, coronary artery disease with angina, perioperative stroke, cerebrovascular sequelae, and acute myocardial infarction types and timing.
- Hypertension (page 50)
- Atherosclerotic Coronary Artery Disease and Angina (page 52)
- Intraoperative and Postprocedural Cerebrovascular Accident (page 53)
- Sequelae of Cerebrovascular Disease (page 53)
- Acute myocardial infarction (AMI) (page 54)
All codes under I71
I71 can't be used on a claim. Pick a billable code below; grey headings group them.
- I71.0Dissection of aorta
- I71.00Dissection of unspecified site of aorta
- I71.01Dissection of thoracic aorta
- I71.010Dissection of ascending aorta
- I71.011Dissection of aortic arch
- I71.012Dissection of descending thoracic aorta
- I71.019Dissection of thoracic aorta, unspecified
- I71.02Dissection of abdominal aorta
- I71.03Dissection of thoracoabdominal aorta
- I71.1Thoracic aortic aneurysm, ruptured
- I71.10Thoracic aortic aneurysm, ruptured, unspecified
- I71.11Aneurysm of the ascending aorta, ruptured
- I71.12Aneurysm of the aortic arch, ruptured
- I71.13Aneurysm of the descending thoracic aorta, ruptured
- I71.2Thoracic aortic aneurysm, without rupture
- I71.20Thoracic aortic aneurysm, without rupture, unspecified
- I71.21Aneurysm of the ascending aorta, without rupture
- I71.22Aneurysm of the aortic arch, without rupture
- I71.23Aneurysm of the descending thoracic aorta, without rupture
- I71.3Abdominal aortic aneurysm, ruptured
- I71.30Abdominal aortic aneurysm, ruptured, unspecified
- I71.31Pararenal abdominal aortic aneurysm, ruptured
- I71.32Juxtarenal abdominal aortic aneurysm, ruptured
- I71.33Infrarenal abdominal aortic aneurysm, ruptured
- I71.4Abdominal aortic aneurysm, without rupture
- I71.40Abdominal aortic aneurysm, without rupture, unspecified
- I71.41Pararenal abdominal aortic aneurysm, without rupture
- I71.42Juxtarenal abdominal aortic aneurysm, without rupture
- I71.43Infrarenal abdominal aortic aneurysm, without rupture
- I71.5Thoracoabdominal aortic aneurysm, ruptured
- I71.50Thoracoabdominal aortic aneurysm, ruptured, unspecified
- I71.51Supraceliac aneurysm of the thoracoabdominal aorta, ruptured
- I71.52Paravisceral aneurysm of the thoracoabdominal aorta, ruptured
- I71.6Thoracoabdominal aortic aneurysm, without rupture
- I71.60Thoracoabdominal aortic aneurysm, without rupture, unspecified
- I71.61Supraceliac aneurysm of the thoracoabdominal aorta, without rupture
- I71.62Paravisceral aneurysm of the thoracoabdominal aorta, without rupture
- I71.8Aortic aneurysm of unspecified site, ruptured
- I71.9Aortic aneurysm of unspecified site, without rupture
I71 MS-DRGs
As the principal diagnosis, all 31 billable codes under I71 group to MS-DRG 299, 300, or 301 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
Other codes that refer to I71
Notes on these codes point to I71.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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 more about aortic aneurysm on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.