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 299.9 Unspecified childhood psychosis View the most recent version of ICD-9-CM 299.9 An obsolete concept, historically used for childhood mental disorders thought to be a form of schizophrenia. 299.9 is a non-specific code that cannot be used to specify a diagnosis 299.9 contains 6 index entries View the ICD-9-CM Volume 1 299.* hierarchy Alternate Terminology Child psychosis NOS Pervasive developmental disorder NOS Schizophrenia, childhood type NOS Schizophrenic syndrome of childhood NOS 299.9 Excludes schizophrenia of adult type occurring in childhood (295.0-295.9)  Index entries containing 299.9: Disorder - see also Disease pervasive developmental 299.9 childhood-onset 299.8 specified NEC 299.8 Psychosis 298.9 childhood, with origin specific to 299.9 atypical 299.8 specified type NEC 299.8 schizophrenia, schizophrenic (see also Schizophrenia) 295.9 childhood type (see also Psychosis, childhood) 299.9 Schizophrenia, schizophrenic (reaction) 295.9 childhood (type) (see also Psychosis, childhood) 299.9 syndrome of childhood NEC (see also Psychosis, childhood) 299.9 Syndrome - see also Disease schizophrenic, of childhood NEC (see also Psychosis, childhood) 299.9