ICD-10-CM 2027
ICD-10 code for bundle of His interruption
From the official ICD-10-CM alphabetic index entry “Interruption › bundle of His”. Page updated September 29, 2026.
About coding bundle of His interruption
The ICD-10-CM code for bundle of His interruption is I44.30 (Unspecified atrioventricular block).
Within I44.3, choose I44.30 (Unspecified atrioventricular block) only when documentation doesn't support a more specific option: other atrioventricular block (I44.39).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 308 (Cardiac Arrhythmia and Conduction Disorders with MCC, relative weight 1.1806), DRG 309 (Cardiac Arrhythmia and Conduction Disorders with CC, relative weight 0.7316) and DRG 310 (Cardiac Arrhythmia and Conduction Disorders without CC/MCC, relative weight 0.568), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about bundle of His interruption ICD-10 codes
What is the ICD-10 code for bundle of His interruption?
- I44.30 — Unspecified atrioventricular block.
Is I44.30 billable?
- Yes. I44.30 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I44.30 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I44.30 as a principal diagnosis.
Is I44.30 a CC or MCC?
- No. I44.30 is neither a CC nor an MCC under MS-DRG v44.0.