ICD-10 Code I49.4 – Other and unspecified premature depolarization (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I49.4 – Other and unspecified premature depolarization
What it is
I49.4 identifies premature depolarizations, also called extra heartbeats, when the record does not specify a more exact type. Use it for atrial, junctional, or ventricular premature beats only if the documentation is nonspecific.
Clinical signs
Patients may report palpitations, skipped beats, or an irregular pulse. Clinical features vary; refer to documentation, and confirm the rhythm disturbance is described as premature depolarization rather than another arrhythmia.
When to use this code
Use I49.4 when the provider documents premature beats, premature depolarization, or extra systoles without naming the chamber of origin. It also fits when the note states “unspecified premature depolarization” or gives only a broad arrhythmia description. Check documentation if the rhythm is better classified elsewhere.
Do not use for
Do not use this code for atrial fibrillation, flutter, tachycardia, or other clearly named arrhythmias. If the record specifies a more exact premature beat type, code that diagnosis instead.
Coding tip
Query for the origin of the premature beat when the note is unclear, because a more specific arrhythmia code may apply.