Athscl autologous artery CABG w oth angina pectoris

This code describes the presence of atherosclerosis, or hardening and narrowing, within a patient's own artery that was surgically grafted to bypass a blocked coronary artery. This specific condition is accompanied by other forms of angina pectoris, indicating chest pain or discomfort due to reduced blood flow to the heart muscle, but not typical stable or unstable angina.

Use this code when documentation clearly indicates atherosclerotic disease affecting an autologous (patient's own vessel) coronary artery bypass graft, and the patient is experiencing angina that doesn't fit the criteria for stable or unstable angina. Supporting documentation would include operative reports detailing the bypass graft, cardiac catheterization findings showing graft atherosclerosis, and physician notes describing the "other forms of angina."

• Ensure the documentation specifies "autologous artery" graft; do not use for synthetic or allograft bypasses.
• Confirm the type of angina is explicitly stated as "other forms" or described in a way that excludes I20.0, I20.1, or I20.9.
• Remember the Excludes1 note: never code this with I20.8- (other forms of angina without graft atherosclerosis).