ICD-10-CM > G00-G99 > G00-G09 > G04 > G04.0 > G04.02 G04.02 Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis Billable/Specific Copy Code Copy Description Applicable To Encephalitis, post immunizationEncephalomyelitis, post immunization Use Additional code to identify the vaccine (T50.A-, T50.B-, T50.Z-)