Is I77.81 a billable ICD-10-CM code?

No. I77.81 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I77.81 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).

What cannot be coded together with I77.81?

I77.81 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.

I77.81

I77.81 — Aortic ectasia

Non-billable headerICD-10-CM

I77.81 is a non-billable header ICD-10-CM code for aortic ectasia. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

aortic aneurysm and dissection (I71.-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Ectasis aorta

Excludes2 inherited from the categories above I77.81

Also inherited, and the opposite of Excludes1: these conditions are not part of I77.81, but a patient can have both, so you may code both.

Written on I77 — Other disorders of arteries and arterioles

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

Risk adjustment

I77.81 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

I77.81 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead I77.81

4 child codes. Green means billable.

Related codes at this level

Codes that share I77.8. If I77.81 is not quite right, the correct code is usually one of these.

Questions about I77.81

Is I77.81 a billable ICD-10-CM code?: No. I77.81 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I77.81 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).
What cannot be coded together with I77.81?: I77.81 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter.