ICD-10-CM > I00-I99 > I30-I5A > I44 I44 Atrioventricular and left bundle-branch block Non-Billable/Non-Specific Codes I44.0Atrioventricular block, first degreeI44.1Atrioventricular block, second degreeI44.2Atrioventricular block, completeI44.3Other and unspecified atrioventricular blockI44.30Unspecified atrioventricular blockI44.39Other atrioventricular blockI44.4Left anterior fascicular blockI44.5Left posterior fascicular blockI44.6Other and unspecified fascicular blockI44.60Unspecified fascicular blockI44.69Other fascicular blockI44.7Left bundle-branch block, unspecified