ICD-10 Code I45.89 – Other specified conduction disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I45.89 – Other specified conduction disorders
What it is
I45.89 is used for a cardiac conduction disorder that does not fit a more specific ICD-10 category. It covers other documented abnormalities in the heart’s electrical conduction system.
Clinical signs
Clinical features vary; refer to documentation. You may see abnormal ECG conduction findings, such as delayed or interrupted electrical impulses, when the provider identifies a conduction disorder but names no more specific type.
When to use this code
Use this code when the record clearly states an “other specified” conduction disorder or describes a conduction abnormality that is not captured by a more specific code. It is appropriate when the provider documents the condition and the chart supports a cardiac conduction problem. Check documentation if the exact type is unclear.
Do not use for
Do not use I45.89 when the documentation supports a more specific conduction disorder code, such as a named bundle branch block or atrioventricular block. Do not assign it for nonspecific chest pain or palpitations alone.
Coding tip
Code the most specific conduction diagnosis documented; if the provider only says “conduction disorder,” verify whether a more specific category applies before using I45.89.