ICD-10 Code
International Classification of Diseases, 10th Revision
Apr 23, 2019

See: Unspecified atrial fibrillation and atrial flutter

  ICD-10 Code for Unspecified atrial fibrillation I48.91

I48.91 is a valid1 ICD 10 diagnosis code.

I48.91 is valid for submission for HIPAA-covered transactions.

Chapter 9 Diseases of the circulatory system (I00-I99)
Section I30-I52 Other forms of heart disease (I30-I52)
Category I48 Atrial fibrillation and flutter

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.

Related Terms to “Unspecified atrial fibrillation”

  • Fibrillation
    • atrial or auricular(established) - I48.91
See the ICD-10-CM Coding Guidelines.

Questions related to I48.91 Unspecified atrial fibrillation

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.