I44.2Atrioventricular block, complete

I44.2 is the ICD-10-CM diagnosis code for atrioventricular block, complete. It belongs to category I44 (atrioventricular and left bundle-branch block), block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within I44 (atrioventricular and left bundle-branch block), I44.2 is specifically for atrioventricular block, complete. Related codes cover atrioventricular block, first degree (I44.0), atrioventricular block, second degree (I44.1), other and unspecified atrioventricular block (I44.3), left anterior fascicular block (I44.4), left posterior fascicular block (I44.5), other and unspecified fascicular block (I44.6) and left bundle-branch block, unspecified (I44.7).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

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), DRG 310 (Cardiac Arrhythmia and Conduction Disorders without CC/MCC, relative weight 0.568), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 05 (Diseases and Disorders of the Circulatory System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 426.0 (atrioventricular block, complete).