ICD-10 Code I25 – Chronic ischemic heart disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25 – Chronic ischemic heart disease
What it is
I25 identifies chronic ischemic heart disease, a long-term condition caused by reduced blood flow to the heart muscle. It includes persistent coronary artery disease and related chronic sequelae.
Clinical signs
Clinical features vary; refer to documentation. Common findings include stable angina, prior myocardial infarction history, or evidence of coronary atherosclerosis with ongoing ischemic heart disease.
When to use this code
Use I25 when the record documents chronic ischemic heart disease or chronic coronary disease, including stable angina or other long-standing ischemic sequelae. Code it when the provider clearly links the condition to ischemic heart disease. Check documentation for the specific subtype if one is named.
Do not use for
Do not use I25 for acute myocardial infarction or other acute coronary syndromes. If the chart only says chest pain, shortness of breath, or suspected ischemia without a confirmed diagnosis, check documentation.
Coding tip
Assign the most specific I25 subcode available when the provider documents a chronic ischemic subtype.