ICD-10 Code I25.6 – Silent myocardial ischemia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I25.6 – Silent myocardial ischemia
What it is
Silent myocardial ischemia means reduced blood flow to the heart muscle without the usual chest pain or other obvious warning symptoms. You code it when documentation identifies ischemia that is clinically present but asymptomatic.
Clinical signs
Clinical features vary; refer to documentation. It may be found on stress testing, ECG changes, or other cardiac evaluation showing ischemia without reported angina or equivalent symptoms.
When to use this code
Use I25.6 when the provider documents silent ischemia, asymptomatic ischemia, or ischemia detected only on testing. This code fits cases where the record clearly states myocardial ischemia is present but the patient does not report symptoms. Check documentation for the specific clinical context and any related coronary disease.
Do not use for
Do not use this code for angina, acute myocardial infarction, or nonspecific chest pain. If the record does not clearly identify silent ischemia, check documentation before assigning I25.6.
Coding tip
Assign the code only when the provider explicitly documents silent or asymptomatic myocardial ischemia.