ICD-10 Code I25.799 – Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.799 – Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris
What it is
This code describes atherosclerotic narrowing or blockage in a coronary bypass graft, with angina pectoris documented but not specified as stable, unstable, or other. Use it when the record identifies graft disease and angina without more detail.
Clinical signs
Clinical features vary; refer to documentation. Typical angina may include chest discomfort or pressure related to myocardial ischemia, but the diagnosis should be supported by provider assessment of bypass graft atherosclerosis and unspecified angina.
When to use this code
Use I25.799 when the provider documents atherosclerosis affecting a coronary artery bypass graft and also documents angina pectoris, but does not specify the angina type. This is appropriate for follow-up visits, problem lists, or discharge summaries that clearly link both conditions. If the record names a different graft type or a more specific angina category, code that instead.
Do not use for
Do not use this code for native coronary artery disease without bypass graft involvement. Do not use it when angina is absent, or when documentation specifies a different angina type or a different bypass graft category.
Coding tip
Confirm the note links the bypass graft atherosclerosis and angina together; if either element is unclear, check documentation.