ICD-10-CM code · FY2027
I48.20 Chronic atrial fibrillation, unspecified
BillableValid for claims as a specific diagnosis code
About I48.20
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Coding notes for I48.20
Excludes1 Not coded here: never report these together with this code (use the code given instead).
- Chronic persistent atrial fibrillation (I48.19)
Chapter 9 notes (apply to every code in it)
Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Related codes in I48.2
Latest research on atrial fibrillation
- Frailty in older adults with atrial fibrillation is multifactorial and associated with metabolic and cognitive factors
- Apixaban (Eliquis) is associated with reduced rates of ischemic stroke and bleeding in patients with atrial fibrillation and advanced chronic kidney disease compared with warfarin (Coumadin)
- Catheter ablation within 1 year of atrial fibrillation diagnosis is associated with reduced risk of recurrence
- COVID-19 vaccination is associated with reduced risk of new-onset atrial fibrillation following COVID-19 infection
- Association between atrial fibrillation and both the in-hospital mortality and disease severity in acute pancreatitis: insights from a multicenter study
Landmark trials from 2MM Classics
- Rivaroxaban noninferior to warfarin in patients with atrial fibrillation and bioprosthetic mitral valves [Classics Series]
- The EARLY-AF Trial: Catheter cryoballoon ablation for atrial fibrillation [Classics Series]
- EAST-AFNET 4 Trial: Early Rhythm Control vs Usual Care in Atrial Fibrillation (East AF) [Classics Series]
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See 2MM+ plansICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.
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