I49.9 is the ICD-10 code for Cardiac arrhythmia, unspecified. It is a four-character subcategory of I49 (Other cardiac arrhythmias), the most specific level in the WHO edition. It belongs to the block I30–I52 (Other forms of heart disease) in Chapter IX, Diseases of the circulatory system.
- Code type
- Subcategory (4 characters)
- Chapter
- IX · I00–I99
- Classification
- WHO ICD-10, 2019 version
What I49.9 includes
Conditions and terms that are coded here.
- Arrhythmia (cardiac) NOS
I49.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
I49.9Uspesifisert hjertearytmi
DI499Hjerterytmeforstyrrelse UNS
- DI499ASøvnrelateret hjertearytmi
I49.9Määrittämätön sydämen rytmihäiriö
I49.9Kardiale Arrhythmie, nicht näher bezeichnet
I49.9Arythmie cardiaque, sans précision
I49.9ritmestoornis, niet-gespecificeerd
I49.9Cardiac arrhythmia, unspecified
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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