Athscl native cor art of txplt heart with refract ang pctrs

This code signifies the presence of atherosclerotic disease affecting the native coronary arteries within a heart that has been surgically transplanted into a recipient. A key feature is that the patient is experiencing angina pectoris that is resistant to standard medical therapy. This indicates a significant and persistent ischemic burden despite interventions.

Use this code when documentation clearly states atherosclerosis of the native coronary arteries in a transplanted heart, specifically noting "refractory angina pectoris." This applies to patients who have undergone cardiac transplantation and are now presenting with persistent, difficult-to-manage chest pain due to coronary artery disease in the original vessels of the donor heart.

• Ensure documentation explicitly states "refractory angina pectoris" and not just "angina."
• Distinguish between atherosclerosis of native coronary arteries (I25.75x) and atherosclerosis of bypass graft(s) (I25.76x) in a transplanted heart.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it contributes to the patient's overall condition.