In simple words: This code describes a condition where the bypass graft used to improve blood flow to the heart in a transplant patient has developed atherosclerosis (plaque buildup), leading to chest pain (angina).

Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris.Excludes1: atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris (I25.812)

Example 1: A patient with a heart transplant presents with angina pectoris and diagnostic angiography reveals atherosclerosis of a coronary artery bypass graft., Following a heart transplant, a patient experiences recurring chest pain, and imaging confirms the presence of atherosclerotic plaque in the bypass graft., A routine follow-up after heart transplantation reveals significant narrowing of a bypass graft due to atherosclerosis, and the patient reports occasional angina.

Documentation should include details of the original heart transplant, the bypass grafting procedure, the current symptoms (including angina), diagnostic findings confirming the atherosclerosis in the bypass graft (e.g., angiography, imaging reports), and other relevant medical history like hypertension or other cardiovascular risk factors.

** This code specifically applies to atherosclerosis in a bypass graft of a *transplanted* heart.Different codes exist for atherosclerosis in bypass grafts of native hearts. It is important to accurately differentiate these scenarios.