2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Congential Anomalies 740-759 > Other Congenital Anomalies Of Heart 746.* > 2008 ICD-9-CM Diagnosis 746.6 Congenital mitral insufficiency  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 Therefore, this code may be out of date.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 746.6 can be accessed here. 746.6 is a specific code that can be used to specify a diagnosis 746.6 contains 4 index entries View the ICD-9-CM Volume 1 746.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 746.6: Anomaly, anomalous (congenital) (unspecified type) 759.9 heart 746.9 valve NEC 746.9 mitral 746.9 insufficiency 746.6 mitral (leaflets) (valve) 746.9 insufficiency 746.6 Insufficiency, insufficient mitral (valve) 424.0 congenital 746.6 Regurgitation 787.03 mitral (valve) - see also Insufficiency, mitral congenital 746.6