ICD-10-CM > V00-Y99 > Y90-Y99 Y90-Y99 Supplementary factors related to causes of morbidity classified elsewhere Notes These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding. Codes Y90Evidence of alcohol involvement determined by blood alcohol levelY92Place of occurrence of the external causeY93Activity codesY95Nosocomial conditionY99External cause status