Coronary atherosclerosis due to calcified coronary lesion

This code signifies a specific type of coronary artery disease characterized by the hardening and narrowing of the coronary arteries due to the accumulation of calcium deposits. These calcified lesions impede blood flow to the myocardium, potentially leading to angina, myocardial infarction, or other ischemic events.

Apply this code when documentation explicitly states coronary atherosclerosis with the presence of calcified lesions. This diagnosis is often supported by imaging studies such as CT angiography (CCTA) or intravascular ultrasound (IVUS) that identify calcification within the coronary arteries.

• Ensure documentation clearly specifies "calcified lesion" as the cause of the atherosclerosis, not just general atherosclerosis.
• Do not use this code for non-calcified coronary atherosclerosis; use more general I25.10 or specific vessel codes as appropriate.
• Consider sequencing this code with codes for angina (I20.-) or myocardial infarction (I21.-) if those conditions are also present and documented.