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 798.1 Instantaneous death View the most recent version of ICD-9-CM 798.1 798.1 is a specific code that can be used to specify a diagnosis 798.1 contains 7 index entries View the ICD-9-CM Volume 1 798.* hierarchy  Index entries containing 798.1: Death instantaneous 798.1 sudden (cause unknown) 798.1 during delivery 669.9 under anesthesia NEC 668.9 infant, syndrome (SIDS) 798.0 puerperal, during puerperium 674.9 violent 798.1 Dropped dead 798.1 Fatal syncope 798.1 Sudden death, cause unknown (less than 24 hours) 798.1 during childbirth 669.9 infant 798.0 puerperal, postpartum 674.9 Syncope (near) (pre-) 780.2 fatal 798.1