I49.4Other and unspecified premature depolarization

I49.4 is the ICD-10-CM diagnosis code for other and unspecified premature depolarization. It belongs to category I49 (other cardiac arrhythmias), 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 2 subcodes must be used instead.

Within I49, choose I49.4 (Other and unspecified premature depolarization) only when documentation doesn't support a more specific option: ventricular fibrillation and flutter (I49.0), atrial premature depolarization (I49.1), junctional premature depolarization (I49.2), ventricular premature depolarization (I49.3), sick sinus syndrome (I49.5), other specified cardiac arrhythmias (I49.8) and cardiac arrhythmia, unspecified (I49.9).

To report this condition, pick the subcode that matches the documentation: I49.40 (depolarization) and I49.49 (depolarization).

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.