ICD-10 Code I25.730 – Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.730 – Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris
What it is
This code identifies hardening and narrowing in a nonautologous biological coronary bypass graft, with unstable angina pectoris. Use it when the graft itself is the documented site of atherosclerotic disease and the angina is unstable.
Clinical signs
Clinical features vary; refer to documentation. Commonly, unstable angina is described as new, worsening, or occurring at rest chest discomfort, with evidence that the bypass graft is affected by atherosclerosis.
When to use this code
Use this code when the provider documents atherosclerosis in a nonautologous biological coronary bypass graft and also documents unstable angina pectoris. You should code it from the final diagnosis, operative note, or cardiology assessment when the graft lesion is the stated cause.
Do not assign it for native coronary artery disease alone or for graft disease without unstable angina. If the record does not clearly identify the graft type or the angina status, check documentation before coding.
Do not use for
Do not use this code for stable angina, unspecified angina, or atherosclerosis of native coronary arteries. Do not use it when the bypass graft type is different or not documented.
Coding tip
Confirm both elements in the record: biological coronary bypass graft involvement and unstable angina pectoris.