ICD-10-CM Diagnosis Code I48. 91 - Unspecified atrial fibrillation I48 91 is a billable diagnosis code used to specify a medical diagnosis of unspecified atrial fibrillation The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026
What Is the ICD-10 Code for Atrial Fibrillation? The Core Classification for Atrial Fibrillation The main classification for Atrial Fibrillation within the ICD-10-CM system falls under the category I48, which groups both “Atrial fibrillation and atrial flutter ” This three-character code provides a general diagnosis but is not specific enough for detailed medical billing or clinical analysis
Atrial Fibrillation (AFIB) ICD 10 - Health Pages The code for types of atrial fibrillation (afib) and flutter in the ICD-10 is I48 It is located within the section known as “other forms of heart disease” which includes codes I30-I52