2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Other Psychoses 295-299 > Psychoses With Origin Specific To Childhood 299.* > 2006 ICD-9-CM Diagnosis 299.0 Infantile autism View the most recent version of ICD-9-CM 299.0 A disorder beginning in childhood. It is marked by the presence of markedly abnormal or impaired development in social interaction and communication and a markedly restricted repertoire of activity and interest. Manifestations of the disorder vary greatly depending on the developmental level and chronological age of the individual. 299.0 is a non-specific code that cannot be used to specify a diagnosis 299.0 contains 6 index entries View the ICD-9-CM Volume 1 299.* hierarchy Alternate Terminology Childhood autism Infantile psychosis Kanner's syndrome 299.0 Excludes disintegrative psychosis (299.1) Heller's syndrome (299.1) schizophrenic syndrome of childhood (299.9)  Index entries containing 299.0: Autism, autistic (child) (infantile) 299.0 Dementia 294.8 infantile, infantilia (see also Psychosis, childhood) 299.0 Disorder - see also Disease autistic 299.0 Kanner's syndrome (autism) (see also Psychosis, childhood) 299.0 Psychosis 298.9 infantile (see also Psychosis, childhood) 299.0 Syndrome - see also Disease Kanner's (autism) (see also Psychosis, childhood) 299.0