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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Conduction Disorders 426.* > 2008 ICD-9-CM Diagnosis 426.6 Other heart block  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 426.6 can be accessed here. Disturbance of heart conduction in which the atrial response is delayed or omitted because of partial or complete interference with the propagation of impulses from the sinoatrial node to the atria. 426.6 is a specific code that can be used to specify a diagnosis 426.6 contains 19 index entries View the ICD-9-CM Volume 1 426.* hierarchy 426.6 also known as: Intraventricular block: NOS diffuse myofibrillar Sinoatrial block Sinoauricular block Index entries containing 426.6: Arborization block (heart) 426.6 Arrest, arrested sinus 426.6 Block arborization (heart) 426.6 heart 426.9 intra-atrial 426.6 intraventricular NEC 426.6 sinoatrial 426.6 specified type NEC 426.6 intraventricular (diffuse) (myofibrillar) 426.6 bundle branch (complete) (false) (incomplete) 426.50 bilateral 426.53 left (see also Block, bundle branch, left) 426.3 right (see also Block, bundle branch, right) 426.4 parietal 426.6 peri-infarction 426.6 sinoatrial 426.6 sinoauricular 426.6 Dropped heart beats 426.6 Sinus - see also Fistula arrest 426.6 pause 426.6 Standstill atrial 426.6 auricular 426.6 sinoatrial 426.6 sinus 426.6