ICD-10 Code I47 – Paroxysmal tachycardia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I47 – Paroxysmal tachycardia
What it is
I47 identifies paroxysmal tachycardia, a sudden-onset episode of abnormally fast heart rate. Use it when documentation names this rhythm disturbance without a more specific subtype.
Clinical signs
Episodes typically begin and stop abruptly and may cause palpitations, chest discomfort, dizziness, or shortness of breath. Clinical features vary; refer to documentation for the documented rhythm diagnosis.
When to use this code
Use I47 when the record documents paroxysmal tachycardia as the diagnosis and no more specific ICD-10 code is provided. It may also apply when the provider describes a paroxysmal supraventricular or other tachycardia but does not specify the exact type. Check documentation if the rhythm is better described by another arrhythmia code.
Do not use for
Do not use this code for sinus tachycardia, atrial fibrillation, atrial flutter, or ventricular fibrillation. If the chart names a different arrhythmia, code that specific condition instead.
Coding tip
Query for the exact arrhythmia type when the note only says “tachycardia,” because specificity can change the correct ICD-10 code.