Athscl CABG, unsp, w angina pectoris w documented spasm

This code signifies the presence of atherosclerosis affecting one or more coronary artery bypass grafts, where the specific type of graft is not documented. This condition is further complicated by angina pectoris, which has been definitively attributed to coronary artery spasm. It describes a patient experiencing chest pain due to vasospasm within a previously bypassed coronary vessel that has also developed atherosclerotic disease.

This code is appropriate when a patient with a history of coronary artery bypass grafting presents with angina, and diagnostic testing (e.g., angiography with provocative testing, ECG changes during symptoms) confirms coronary artery spasm as the cause of the angina, in addition to evidence of atherosclerosis within the bypass graft(s). Documentation must explicitly state both "atherosclerosis of coronary artery bypass graft(s)" and "angina pectoris with documented spasm."

• Ensure documentation clearly distinguishes between spasm in native coronary arteries versus bypass grafts.
• Do not use this code if the angina with documented spasm is not associated with atherosclerosis of a bypass graft; refer to the Excludes1 note.
• Verify that the "spasm" is explicitly documented as the cause of the angina, not just an incidental finding.