I48.9
Non-billableUnspecified atrial fibrillation and atrial flutter
Unspecified atrial fibrillation and atrial flutter
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
Child Codes (2)
Related Codes(5)
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(1)
Frequently Asked Questions
What is the ICD-10 code for unspecified atrial fibrillation and atrial flutter?
The ICD-10-CM code for unspecified atrial fibrillation and atrial flutter is I48.9. The full clinical description is "Unspecified atrial fibrillation and atrial flutter". I48.9 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code I48.9 mean?
ICD-10-CM code I48.9 represents “Unspecified atrial fibrillation and atrial flutter”. It is classified under Chapter 9: Diseases of the Circulatory System and is a non-billable header code. Use a more specific child code for billing purposes.
Is I48.9 a billable code?
No, I48.9 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 2 child codes under I48.9.
What chapter is I48.9 in?
I48.9 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What are the subcategories under I48.9?
I48.9 has 2 child codes, including: I48.91 (Unspecified atrial fibrillation), I48.92 (Unspecified atrial flutter).
What are the UMLS CUIs for I48.9?
I48.9 is linked to 1 UMLS Concept Unique Identifier: C3264373. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I48.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like unspecified atrial fibrillation and atrial flutter affect a person's functioning: body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I48.9?
I48.9 maps to the ICD-11 code: BC81.Z (Supraventricular tachyarrhythmia, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.