I48 ICD-10-CM Code: Atrial fibrillation and flutter
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
I48Atrial fibrillation and flutter
ICD-10-CM diagnosis code · United States clinical modification
Where I48 sits
- 1
Chapter 9
Diseases of the circulatory system (I00-I99)
- 2
Section
Other forms of heart disease (I30-I5A)
- 3
Category I48
Atrial fibrillation and flutter
- 4
Code I48
Atrial fibrillation and flutter
Codes under I48
I48 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for I48.
Code first
No “code first” instruction is listed for I48.
Use additional code
No “use additional code” instruction is listed for I48.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for I48.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for I48.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code I48 mean?
I48 is the FY 2027 U.S. ICD-10-CM code for “Atrial fibrillation and flutter.”
Is I48 a billable or specific ICD-10-CM code?
No. I48 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is I48 located in ICD-10-CM?
I48 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other forms of heart disease (I30-I5A) (I30–I5A), under category I48, Atrial fibrillation and flutter.
What coding notes are listed for I48?
No inclusion terms are listed for I48 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.