I49Other cardiac arrhythmias

I49 is the ICD-10-CM diagnosis code for other cardiac arrhythmias. It belongs to block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 8 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I49.0 (flutter), I49.1 (depolarization), I49.2 (depolarization), I49.3 (depolarization), I49.4 (depolarization), I49.5 (syndrome), I49.8 (arrhythmias) and I49.9 (unspecified).

The conditions in its Excludes2 note aren't part of I49, but may be coded alongside it if the patient has both: bradycardia NOS (R00.1), neonatal dysrhythmia (P29.1-), sinoatrial bradycardia (R00.1), sinus bradycardia (R00.1) and 1 more.

Code first cardiac arrhythmia complicating: abortion or ectopic or molar pregnancy (O00-O07, O08.8) and obstetric surgery and procedures (O75.4).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.