ICD-10 Code I48.92 – Unspecified atrial flutter (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I48.92 – Unspecified atrial flutter
What it is
I48.92 identifies atrial flutter when the provider documents the rhythm but does not specify the type. It is a supraventricular arrhythmia with organized atrial activity and rapid atrial rates.
Clinical signs
Patients may have palpitations, shortness of breath, chest discomfort, dizziness, or an irregular pulse. ECG documentation of atrial flutter is the key finding; clinical features vary, refer to documentation.
When to use this code
Use this code when the record states atrial flutter without further detail such as typical, atypical, or chronic. It also fits when the note confirms flutter but does not identify the atrial circuit or pattern. Verify that the diagnosis is current and documented by the provider.
Do not use for
Do not use this code for atrial fibrillation, supraventricular tachycardia, or other specified flutter types. If the chart gives a more specific atrial flutter diagnosis, code that instead.
Coding tip
Query the provider if the documentation only says “flutter” and the type is unclear.