ICD-10 Code I25.89 – Other forms of chronic ischemic heart disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.89 – Other forms of chronic ischemic heart disease
What it is
I25.89 is used for chronic ischemic heart disease that does not fit a more specific ICD-10-CM category. It indicates long-standing reduced blood flow to the heart muscle, documented in a nonspecific or other defined form.
Clinical signs
Clinical features vary; refer to documentation. You may see angina, prior ischemic findings, or evidence of chronic coronary insufficiency, but the record should support a chronic ischemic heart disease diagnosis.
When to use this code
Use this code when the provider documents chronic ischemic heart disease and no more specific I25 category applies. It may fit cases described as “other” chronic ischemic heart disease or when the exact subtype is not separately listed. Check documentation for the most specific available code.
Do not use for
Do not use it for acute myocardial infarction, unstable angina, or other clearly specified ischemic heart disease categories. If the chart identifies a more exact chronic coronary diagnosis, code that instead.
Coding tip
Look for the provider’s exact wording and code the most specific chronic ischemic heart disease option available before defaulting to I25.89.