Which ICD-10-CM code is reported for a patient undergoing heart surgery for angina decubitus and coronary artery disease?

The appropriate ICD-10-CM code for a patient undergoing heart surgery for angina decubitus and coronary artery disease is I25.118. This code specifically designates "Other forms of chronic ischemic heart disease," which encompasses situations where patients may experience angina as a result of coronary artery disease that is classified differently than just stable angina.

Angina decubitus is characterized by angina pain that occurs when a patient is lying down, which makes it a particular variation of angina pectoris that must be coded correctly to ensure accurate reflection of a patient's condition and treatment.

In this context, I25.118 accurately captures the complexity of the patient's cardiology issues related to coronary artery disease, while other codes may be too general or specific to other subtypes of ischemic heart disease or angina.