2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Congenital Anomalies 740-759 > Other Congenital Anomalies Of Heart 746.* > 2006 ICD-9-CM Diagnosis 746.82 Cor triatriatum View the most recent version of ICD-9-CM 746.82 A congenital anomaly characterized by the presence in the atrium of a perforated muscular membrane which separates the atrium into upper and lower chambers. 746.82 is a specific code that can be used to specify a diagnosis 746.82 contains 2 index entries View the ICD-9-CM Volume 1 746.* hierarchy  Index entries containing 746.82: Cor triatriatum, triatrium 746.82 Double auricle (heart) 746.82