ICD-10 Code I25.79 – Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.79 – Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris
What it is
This code identifies atherosclerotic narrowing or blockage in a coronary artery bypass graft other than an internal mammary artery graft, with angina pectoris present. It reflects chronic graft disease causing reduced blood flow to the heart.
Clinical signs
Patients typically have chest pain or pressure consistent with angina, often triggered by exertion or stress and relieved by rest. Documentation may also show ischemic symptoms or evidence of graft-related coronary disease; clinical features vary, refer to documentation.
When to use this code
Use I25.79 when the provider documents atherosclerosis in a coronary bypass graft and angina pectoris is also documented. This applies to grafts other than internal mammary artery grafts. Code the condition only when the record clearly links the graft disease and angina.
Do not use for
Do not use this code for angina without documented graft atherosclerosis, or for atherosclerosis of native coronary arteries. It also does not apply to internal mammary artery graft disease; check documentation.
Coding tip
Verify the graft type and confirm that angina is documented as part of the same condition before assigning I25.79.