ICD-10-CM 2027
ICD-10 code for Extrasystolic arrhythmia
From the official ICD-10-CM alphabetic index entry “Arrhythmia (auricle)(cardiac)(juvenile)(nodal)(reflex)(supraventricular)(transitory)(ventricle) › extrasystolic”. Page updated September 29, 2026.
About coding Extrasystolic arrhythmia
The ICD-10-CM code for Extrasystolic arrhythmia is I49.49 (Other premature depolarization).
Within I49.4, choose I49.49 (Other premature depolarization) only when documentation doesn't support a more specific option: unspecified premature depolarization (I49.40).
Code first cardiac arrhythmia complicating: abortion or ectopic or molar pregnancy (O00-O07, O08.8) and obstetric surgery and procedures (O75.4).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about Extrasystolic arrhythmia ICD-10 codes
What is the ICD-10 code for Extrasystolic arrhythmia?
- I49.49 — Other premature depolarization.
Is I49.49 billable?
- Yes. I49.49 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I49.49 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I49.49 as a principal diagnosis.
Is I49.49 a CC or MCC?
- No. I49.49 is neither a CC nor an MCC under MS-DRG v44.0.