ICD-10-CM I48: Atrial fibrillation and flutter

ICD-10-CM Diagnosis Code (2025)

Official Description for I48

Atrial fibrillation and flutter

Coding Notes & Guidelines for I48

Excludes1: Not Coded Here

Permanent atrial fibrillation (I48.21)

Excludes1: Not Coded Here

Chronic persistent atrial fibrillation (I48.19)

Inclusion Terms
  • Chronic persistent atrial fibrillation
  • Persistent atrial fibrillation, NOS
Inclusion Terms

Type I atrial flutter

Inclusion Terms

Type II atrial flutter

Child Codes (More Specific Codes for I48):

I48.0 - Paroxysmal atrial fibrillation I48.1 - Persistent atrial fibrillation I48.11 - Longstanding persistent atrial fibrillation I48.19 - Other persistent atrial fibrillation I48.2 - Chronic atrial fibrillation I48.20 - Chronic atrial fibrillation, unspecified I48.21 - Permanent atrial fibrillation I48.3 - Typical atrial flutter I48.4 - Atypical atrial flutter I48.9 - Unspecified atrial fibrillation and atrial flutter I48.91 - Unspecified atrial fibrillation I48.92 - Unspecified atrial flutter

About ICD-10-CM Code I48 (Atrial fibrillation and flutter)

ICD-10-CM code I48 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I48 became effective on October 1, 2024.

This page provides detailed information about I48 - Atrial fibrillation and flutter. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Atrial fibrillation and flutter.