ICD-10-CM > I00-I99 > I30-I5A > I48 I48 Atrial fibrillation and flutter Non-Billable/Non-Specific Codes I48.0Paroxysmal atrial fibrillationI48.1Persistent atrial fibrillationI48.11Longstanding persistent atrial fibrillationI48.19Other persistent atrial fibrillationI48.2Chronic atrial fibrillationI48.20Chronic atrial fibrillation, unspecifiedI48.21Permanent atrial fibrillationI48.3Typical atrial flutterI48.4Atypical atrial flutterI48.9Unspecified atrial fibrillation and atrial flutterI48.91Unspecified atrial fibrillationI48.92Unspecified atrial flutter