Athscl nonaut biological CABG with refractory ang pctrs

This code signifies the presence of atherosclerosis specifically within a non-autologous (e.g., bovine, porcine) biological coronary artery bypass graft. This graft disease is causing refractory angina pectoris, meaning the chest pain is persistent and not adequately relieved by standard medical therapy.

Use this code when documentation clearly indicates atherosclerotic disease affecting a biological bypass graft that was not harvested from the patient's own body. The patient must also be experiencing refractory angina pectoris directly attributable to this graft pathology. Supporting documentation would include cardiology notes, angiography reports, and treatment plans for refractory angina.

• Ensure the graft is explicitly documented as "non-autologous biological" to differentiate from autologous grafts (e.g., saphenous vein, internal mammary artery).
• Verify that the angina is specified as "refractory" and not simply stable or unstable angina.
• Sequence this code after any underlying coronary artery disease if still present and contributing to the patient's overall condition.