ICD-10-CM · FY 2026 APRIL UPDATE
I48
Atrial fibrillation and flutter
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| I48.0 | Paroxysmal atrial fibrillation | Billable |
| I48.1 | Persistent atrial fibrillation | Category |
| I48.11 | Longstanding persistent atrial fibrillation | Billable |
| I48.19 | Other persistent atrial fibrillation | Billable |
| I48.2 | Chronic atrial fibrillation | Category |
| I48.20 | Chronic atrial fibrillation, unspecified | Billable |
| I48.21 | Permanent atrial fibrillation | Billable |
| I48.3 | Typical atrial flutter | Billable |
| I48.4 | Atypical atrial flutter | Billable |
| I48.9 | Unspecified atrial fibrillation and atrial flutter | Category |
| I48.91 | Unspecified atrial fibrillation | Billable |
| I48.92 | Unspecified atrial flutter | Billable |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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