ICD-10 Code I25.790 – Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.790 – Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris
What it is
This code identifies atherosclerotic narrowing or blockage in a coronary artery bypass graft, along with unstable angina pectoris. Use it when the graft disease and the unstable angina are both documented.
Clinical signs
Unstable angina is typically marked by new, worsening, or resting chest discomfort suggestive of myocardial ischemia. Clinical features vary; refer to documentation and supporting cardiac evaluation.
When to use this code
Use I25.790 when the provider documents atherosclerosis affecting a coronary bypass graft other than the specified graft types, and also documents unstable angina. It is appropriate for encounters focused on graft disease with active ischemic symptoms. If the record does not clearly link the graft lesion and angina, check documentation.
Do not use for
Do not use this code for atherosclerosis of native coronary arteries or for bypass graft disease without unstable angina. If the angina type is not documented, check documentation before assigning this code.
Coding tip
Confirm both the graft location and the unstable angina diagnosis in the provider note before coding.