ICD-10 Code I25.41 – Coronary artery aneurysm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.41 – Coronary artery aneurysm
What it is
I25.41 identifies a coronary artery aneurysm, meaning an abnormal focal dilation of a coronary artery. It is used when the aneurysm involves the coronary vessels and is documented as such.
Clinical signs
Clinical features vary; refer to documentation. Patients may be asymptomatic or have chest pain, ischemic symptoms, or findings on coronary imaging showing localized arterial enlargement.
When to use this code
Use this code when the provider documents a coronary artery aneurysm on imaging, angiography, or in the assessment. It also fits follow-up visits when the aneurysm remains an active diagnosis. Check documentation if the record instead describes coronary ectasia or another vascular disorder.
Do not use for
Do not use this code for aneurysms in non-coronary vessels or for nonspecific chest pain without documented coronary aneurysm. If the chart only mentions a history of aneurysm without current relevance, check documentation.
Coding tip
Code only when the coronary aneurysm is clearly documented, and verify whether it is current, historical, or part of another cardiac condition.