ICD-10-CM › I00-I99 › I70-I79 › I71.01 Dissection of thoracic aorta › I71.012

Valid for claims with a date of service in the current code year.

Valid FY2023 onwards.

What has happened to this code

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from I71 Aortic aneurysm and dissection

Code first

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

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

• Sacculation > aorta
• Necrosis, necrotic > aorta
• Aortectasia > with aneurysm
• Hematoma > aortic intramural
• Widening aorta > with aneurysm
• Dilatation > aorta > with aneuysm
• Necrosis, necrotic > cystic medial
• Aneurysm > aorta, aortic > dissecting
• Hematoma > aorta, dissecting > thoracic
• Ectasia, ectasis > aorta > with aneurysm
• Necrosis, necrotic > aorta > cystic medial
• Dissection > aorta > thoracic > descending thoracic aorta

Codes in the same group

Code	Description	Status
I71.010	Dissection of ascending aorta	Valid
I71.011	Dissection of aortic arch	Valid
I71.019	Dissection of thoracic aorta, unspecified	Valid