I48.4 – Atypical atrial flutter
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I48.4
- Code
I48.4(claims format:I484)- Description
- Atypical atrial flutter
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
- Parent codes
- I48
Notes for I48.4
Applicable to:
- Type II atrial flutter
Index terms for I48.4
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I48
Frequently asked questions
What is ICD-10 code I48.4?
I48.4 is the ICD-10-CM code for atypical atrial flutter, in the block I30-I5A (Other forms of heart disease).
Is I48.4 a billable code?
Yes. I48.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I48.4 belong to?
It belongs to category I48 – Atrial fibrillation and flutter.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.