ICD-10-CM 2027
ICD-10 code for premature beat
From the official ICD-10-CM alphabetic index entry “Beat (s) › premature”. Page updated September 29, 2026.
About coding premature beat
The ICD-10-CM code for premature beat is I49.40 (Unspecified premature depolarization). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I49.40.
Within I49.4, choose I49.40 (Unspecified premature depolarization) only when documentation doesn't support a more specific option: other premature depolarization (I49.49).
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.
More specific premature beat codes (official index)
Common questions about premature beat ICD-10 codes
What is the ICD-10 code for premature beat?
- I49.40 — Unspecified premature depolarization. More specific codes apply when the documentation supports them: I49.1, I49.1, I49.1.
What is the ICD-10 code for atrial premature beat?
- I49.1 — Atrial premature depolarization.
What is the ICD-10 code for auricular premature beat?
- I49.1 — Atrial premature depolarization.
What is the ICD-10 code for supraventricular premature beat?
- I49.1 — Atrial premature depolarization.
Is I49.40 billable?
- Yes. I49.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I49.40 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I49.40 as a principal diagnosis.
Is I49.40 a CC or MCC?
- No. I49.40 is neither a CC nor an MCC under MS-DRG v44.0.