ICD-10 Code I49.2 – Junctional premature depolarization (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I49.2 – Junctional premature depolarization
What it is
I49.2 identifies a premature electrical impulse that starts in the atrioventricular junction rather than the sinus node. It describes an early junctional beat, not a sustained rhythm disorder.
Clinical signs
Clinical features vary; refer to documentation. You may see an irregular pulse, a premature beat on ECG, or a junctional P wave pattern associated with the early depolarization.
When to use this code
Use this code when the provider documents junctional premature depolarization or premature junctional beats as the diagnosis. It may also fit when ECG interpretation clearly identifies a junctional premature impulse and the record supports a clinical diagnosis.
Code it only when the finding is relevant to the encounter and not just an incidental tracing comment. Check documentation if the note instead describes another arrhythmia, such as premature atrial or ventricular depolarization.
Do not use for
Do not use I49.2 for premature atrial beats, premature ventricular beats, or unspecified dysrhythmias. Check documentation when the rhythm abnormality is only suspected or not confirmed.
Coding tip
Match the code to the provider’s exact rhythm terminology and avoid assuming “premature beat” means junctional unless the source explicitly says so.