I77.81 – Aortic ectasia

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

Non-billable header

ICD-10-CM code I77.81

Code: I77.81 (claims format: I7781)
Description: Aortic ectasia
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: I77 › I77.8

Billable codes under I77.81

I77.81 is a header code and cannot be used on claims. Choose the most specific code:

I77.810 – Thoracic aortic ectasiaBillable
I77.811 – Abdominal aortic ectasiaBillable
I77.812 – Thoracoabdominal aortic ectasiaBillable
I77.819 – Aortic ectasia, unspecified siteBillable

Notes for I77.81

Applicable to:

Ectasis aorta

Excludes1 (not coded here):

aortic aneurysm and dissection (I71.-)

Notes inherited from parent codes

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

I77 – Other disorders of arteries and arterioles

Excludes2 (not included here):

collagen (vascular) diseases (M30-M36)
hypersensitivity angiitis (M31.0)
pulmonary artery (I28.-)

Related codes in I77.8

Frequently asked questions

What is ICD-10 code I77.81?

I77.81 is the ICD-10-CM code for aortic ectasia, in the block I70-I79 (Diseases of arteries, arterioles and capillaries).

Is I77.81 a billable code?

No. I77.81 is a header code with more specific child codes; report one of the billable codes listed above.

What category does I77.81 belong to?

It belongs to category I77 – Other disorders of arteries and arterioles.

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.