Non-Billable / Non-Specific Code
ICD-10-CM I48 is the diagnosis code for Atrial fibrillation and flutter. This code falls under the section "Other forms of heart disease" within Chapter 9 — Diseases of the circulatory system (I00-I99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where I48 sits in the ICD-10-CM classification helps ensure proper coding:
No, I48 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
I48 is the ICD-10-CM diagnosis code for "Atrial fibrillation and flutter". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
I48 is located in Section I30-I5A — "Other forms of heart disease" within Chapter 9 of the ICD-10-CM Tabular List.
I48 has 6 sub-code(s) that provide more specific detail: I48.0, I48.1, I48.2, I48.3, I48.4 and more.
Use I48 when the patients documented diagnosis matches "Atrial fibrillation and flutter" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Atrial fibrillation and flutter is I48.
No, I48 is non-billable. Use a more specific sub-code for primary diagnosis billing.
I48 is in Chapter 9 of the ICD-10-CM Tabular List.
Yes, I48 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.