I71.01 – Dissection of thoracic aorta

ICD-10-CM 2027 diagnosis code · Diseases of arteries, arterioles and capillaries

Non-billable header

ICD-10-CM code I71.01

Code: I71.01 (claims format: I7101)
Description: Dissection of thoracic aorta
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I70-I79 Diseases of arteries, arterioles and capillaries
Parent codes: I71 › I71.0

Billable codes under I71.01

I71.01 is a header code and cannot be used on claims. Choose the most specific code:

I71.010 – Dissection of ascending aortaBillable
I71.011 – Dissection of aortic archBillable
I71.012 – Dissection of descending thoracic aortaBillable
I71.019 – Dissection of thoracic aorta, unspecifiedBillable

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I71 – Aortic aneurysm and dissection

Code first:

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

Related codes in I71.0

I71.00 – Dissection of unspecified site of aortaBillable
I71.02 – Dissection of abdominal aortaBillable
I71.03 – Dissection of thoracoabdominal aortaBillable

Frequently asked questions

What is ICD-10 code I71.01?

I71.01 is the ICD-10-CM code for dissection of thoracic aorta, in the block I70-I79 (Diseases of arteries, arterioles and capillaries).

Is I71.01 a billable code?

No. I71.01 is a header code with more specific child codes; report one of the billable codes listed above.

What category does I71.01 belong to?

It belongs to category I71 – Aortic aneurysm and dissection.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.