Is I77.1 a billable ICD-10-CM code?

Yes. I77.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I77.1 sit in the tabular list?

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

I77.1

I77.1 — Stricture of artery

Billable / specific codeICD-10-CM

I77.1 is a billable, specific ICD-10-CM code for stricture of artery. It is valid for submission on a claim.

Inclusion terms

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

Narrowing of artery

Excludes2 inherited from the categories above I77.1

Also inherited, and the opposite of Excludes1: these conditions are not part of I77.1, 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

I77.1 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.

Medicare coverage

I77.1 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A52996Billing and Coding: Routine Foot Care
A56460Billing and Coding: Dialysis Access Maintenance
A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

How I77.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I77.1.

Compression›artery
Disease, diseased›obliterative vascular
Insufficiency, insufficient›arterial
Kink, kinking›artery
Narrowing›artery
Obliteration›artery
Obliteration›disease, arteriolar
Stenosis, stenotic›artery NEC
Stricture›artery
Torsion›aorta, acquired
Tortuous›artery
Disease, diseased›vascular›obliterative

Code history

I77.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share I77. If I77.1 is not quite right, the correct code is usually one of these.

Questions about I77.1

Is I77.1 a billable ICD-10-CM code?: Yes. I77.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I77.1 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).