2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Symptoms, Signs, And Ill-Defined Conditions 780-799 > Ill-Defined And Unknown Causes Of Morbidity And Mortality 797-799 > Sudden Death Cause Unknown 798.* > 2006 ICD-9-CM Diagnosis 798.2 Death occurring in less than 24 hours from onset of symptoms not otherwise explained View the most recent version of ICD-9-CM 798.2 798.2 is a specific code that can be used to specify a diagnosis 798.2 contains 3 index entries View the ICD-9-CM Volume 1 798.* hierarchy Alternate Terminology Death known not to be violent or instantaneous, for which no cause could be discovered Died without sign of disease  Index entries containing 798.2: Death cause unknown 798.2 Died - see also Death without sign of disease 798.2 SUDS (Sudden unexplained death) 798.2