I49: Other cardiac arrhythmias
Codes under I49 (Other cardiac arrhythmias). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I49.0 | Ventricular fibrillation and flutter | — |
| I49.0 | Ventricular fibrillation and flutter | — |
| I49.01 | Ventricular fibrillation | ✓ |
| I49.01 | Ventricular fibrillation | ✓ |
| I49.1 | Atrial premature depolarization | ✓ |
| I49.1 | Atrial premature depolarization | ✓ |
| I49.02 | Ventricular flutter | ✓ |
| I49.02 | Ventricular flutter | ✓ |
| I49.2 | Junctional premature depolarization | ✓ |
| I49.2 | Junctional premature depolarization | ✓ |
| I49.3 | Ventricular premature depolarization | ✓ |
| I49.3 | Ventricular premature depolarization | ✓ |
| I49.4 | Other and unspecified premature depolarization | — |
| I49.4 | Other and unspecified premature depolarization | — |
| I49.5 | Sick sinus syndrome | ✓ |
| I49.5 | Sick sinus syndrome | ✓ |
| I49.8 | Other specified cardiac arrhythmias | ✓ |
| I49.8 | Other specified cardiac arrhythmias | — |
| I49.9 | Cardiac arrhythmia, unspecified | ✓ |
| I49.9 | Cardiac arrhythmia, unspecified | ✓ |
| I49.40 | Unspecified premature depolarization | ✓ |
| I49.40 | Unspecified premature depolarization | ✓ |
| I49.49 | Other premature depolarization | ✓ |
| I49.49 | Other premature depolarization | ✓ |
| I49.81 | Brugada syndrome | ✓ |
| I49.82 | Ventricular bigeminy | ✓ |
| I49.89 | Other specified cardiac arrhythmias not elsewhere classified | ✓ |
Frequently asked questions
What is ICD-10-CM code I49?
I49 is an ICD-10-CM category covering Other cardiac arrhythmias. It contains 27 more specific diagnosis codes, 22 of which are billable.
Is I49 a billable code?
No — I49 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I49.0 — Ventricular fibrillation and flutter). 22 of the 27 codes under I49 are billable.
What codes fall under I49?
I49 includes I49.0, I49.0, I49.01, I49.01, I49.1, plus 22 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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