Coronary atherosclerosis due to calcified coronary lesion

This code identifies coronary artery disease specifically caused by the hardening and narrowing of the coronary arteries due to calcium deposits. It signifies a chronic condition where plaque buildup, including calcification, obstructs blood flow to the heart muscle.

Apply this code when documentation explicitly states coronary atherosclerosis with a calcified lesion or calcification of the coronary arteries. This diagnosis is typically supported by imaging studies such as CT angiography or intravascular ultrasound demonstrating calcific plaque.

• Do not use this code for non-calcified atherosclerotic lesions; use more general atherosclerosis codes.
• Always sequence this code after any acute myocardial infarction if present, as it represents the underlying cause.
• Ensure documentation clearly specifies "calcified" to differentiate from other forms of coronary atherosclerosis.