I44 Atrioventricular and left bundle-branch blockNon-billable header with 8 child codes.
I44.0 Atrioventricular block, first degreeI44.1 Atrioventricular block, second degreeI44.2 Atrioventricular block, completeI44.3 Other and unspecified atrioventricular blockI44.4 Left anterior fascicular blockI44.5 Left posterior fascicular blockI44.6 Other and unspecified fascicular blockI44.7 Left bundle-branch block, unspecified