I48.92 — Unspecified atrial flutter

I48.92

ICD-10 Chapter 9: Circulatory System — illustrative image — Chapter 9: Diseases of the circulatory system (I00–I99) — illustrative image

What this code means

Atrial flutter is a fast, regular abnormal heart rhythm arising from the upper chambers of the heart.

Also called: atrial flutter.

When this code is used

Used for atrial flutter when the type is not specified.

Where it sits in ICD-10-CM

Code I48.92 belongs to Chapter 9: Diseases of the circulatory system, which covers codes I00–I99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Palpitations

Related anatomy

Heart

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Frequently asked questions

What is ICD-10-CM code I48.92?

I48.92 is the ICD-10-CM diagnosis code for “Unspecified atrial flutter”. Atrial flutter is a fast, regular abnormal heart rhythm arising from the upper chambers of the heart.

When is code I48.92 used?

Used for atrial flutter when the type is not specified. It belongs to Chapter 9 of ICD-10-CM (Diseases of the circulatory system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.