ICD-10 Code I25.82 – Chronic total occlusion of coronary artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.82 – Chronic total occlusion of coronary artery
What it is
I25.82 identifies a chronic, complete blockage of a coronary artery. The occlusion is long-standing, not an acute event, and it limits blood flow to heart muscle.
Clinical signs
Clinical features vary; refer to documentation. Common records may note chronic coronary artery obstruction on angiography, prior infarct-related changes, or persistent ischemic symptoms consistent with long-term vessel closure.
When to use this code
Use I25.82 when the provider documents a chronic total occlusion of a coronary artery, usually confirmed by imaging or catheterization. Code it when the record clearly distinguishes the lesion as chronic rather than acute. If the note only says coronary artery disease without this finding, check documentation.
Do not use for
Do not use this code for acute coronary occlusion, unstable angina, or nonspecific coronary atherosclerosis without a documented total occlusion. Check documentation if the artery status is unclear.
Coding tip
Code I25.82 only when the chronic total occlusion is explicitly documented by the provider.