I25.710

HCC Category Mapping

What This Code Means

Plaque narrowing in a vein graft used for heart bypass surgery causing unstable chest pain that occurs unpredictably.

Coding Tips

• •Confirm the bypass graft is specifically an 'autologous vein' graft (typically saphenous vein)
• •Verify 'unstable angina' is documented to distinguish from other angina presentations

Clinical Significance

This code identifies atherosclerotic disease in an autologous vein coronary artery bypass graft with unstable angina, representing a high-acuity condition with significant morbidity and mortality risk. Unstable angina in the setting of graft disease suggests acute ischemia and potential graft failure. This is a clinically urgent finding that typically warrants emergent evaluation and possible revascularization.

Documentation Requirements

• ✓History of CABG with specific documentation that the graft is an autologous vein (saphenous vein graft)
• ✓Clinical or angiographic evidence of atherosclerotic disease within the vein graft
• ✓Documentation of unstable angina pattern — new onset, crescendo pattern, or angina at rest
• ✓Acute evaluation findings including ECG changes, troponin levels, or stress test results
• ✓Treatment plan addressing the acute ischemic episode and graft disease management

Commonly Confused Codes