I48.9
Header — not billableUnspecified atrial fibrillation and atrial flutter
The ICD-10 code for unspecified atrial fibrillation and atrial flutter is I48.9.
I48.9 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under I48.9
Related codes in this category
- I48.0Paroxysmal atrial fibrillation
- I48.1Persistent atrial fibrillationnon-billable header
- I48.2Chronic atrial fibrillationnon-billable header
- I48.3Typical atrial flutter
- I48.4Atypical atrial flutter
- I48.9Unspecified atrial fibrillation and atrial flutternon-billable header