Atherosclerosis of CABG w oth angina pectoris

This code signifies the presence of atherosclerosis affecting a coronary artery bypass graft (CABG) other than the native coronary arteries, specifically when the patient is experiencing other forms of angina pectoris. It indicates a complication of a prior revascularization procedure where the grafted vessel itself has developed atherosclerotic disease, leading to anginal symptoms not classified as unstable, Prinzmetal's, or exertional.

Use this code when documentation clearly states atherosclerosis of a coronary artery bypass graft (e.g., saphenous vein graft, internal mammary artery graft) and the patient presents with angina pectoris described as "other forms," such as microvascular angina or angina equivalent. This code is appropriate when the angina is directly attributed to the graft's atherosclerotic changes.

• Ensure documentation specifies "atherosclerosis of bypass graft" and "other forms of angina pectoris."
• Do not code with I20.8- (other forms of angina pectoris without atherosclerosis of bypass graft) due to the Excludes1 note.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is treatment of the angina or the graft atherosclerosis.