ICD-10 Code I71.019 – Dissection of thoracic aorta, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I71.019 – Dissection of thoracic aorta, unspecified
What it is
I71.019 identifies a thoracic aortic dissection when the documentation does not specify the exact thoracic segment. It describes a tear in the aortic wall with blood tracking between layers.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include sudden severe chest, back, or tearing pain, and imaging evidence of a thoracic aortic dissection.
When to use this code
Use this code when the record confirms a thoracic aortic dissection but does not name the ascending, arch, or descending portion. You may also use it when the provider documents the condition as thoracic aorta, unspecified. Check the imaging report and final diagnosis for specificity before assigning a more detailed code.
Do not use for
Do not use it for abdominal aortic dissection or for thoracic dissection with a specified segment. If the chart supports a different aortic diagnosis, code that condition instead.
Coding tip
Query for the exact thoracic location whenever the note only says “aortic dissection.”