I48.21
I48.21: Permanent atrial fibrillation
Billable / specific codeICD-10-CM
I48.21 is a billable, specific ICD-10-CM code for permanent atrial fibrillation. It is valid for submission on a claim.
Check I48.21 with the rest of the claim: free scrubberOther codes that can never be billed with I48.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
- I48.1Persistent atrial fibrillation
Risk adjustment
I48.21 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 238 Specified Heart Arrhythmias0.299 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
I48.21 is named in 38 Medicare coverage policies: 38 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A54831Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemaker
- A54958Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemaker
- A56451Billing and Coding: Cardiac Computed Tomography (CCT) and Coronary Computed Tomography Angiography (CCTA)
Alphabetic index entries that lead here
- Fibrillation›atrial or auricular›permanent
The condition this code belongs to
Code history
Unchanged in every release from FY2024 to FY2027.