2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Congential Anomalies 740-759 > Bulbus Cordis Anomalies And Anomalies Of Cardiac Septal Closure 745.* > 2008 ICD-9-CM Diagnosis 745.6 Endocardial cushion defects  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 Therefore, this code may be out of date.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 745.6 can be accessed here. A spectrum of septal defects associated with persistence of the embryonic atrioventricular canal due to incomplete growth and fusion of the endocardial cushion. 745.6 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 745.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog.