2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Other Psychoses 295-299 > Other Nonorganic Psychoses 298.* > 2008 ICD-9-CM Diagnosis 298.8 Other and unspecified reactive psychosis  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 298.8 can be accessed here. 298.8 is a specific code that can be used to specify a diagnosis 298.8 contains 15 index entries View the ICD-9-CM Volume 1 298.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 298.8 also known as: Brief psychotic disorder Brief reactive psychosis NOS Hysterical psychosis Psychogenic psychosis NOS Psychogenic stupor 298.8 excludes: acute hysterical psychosis (298.1) Index entries containing 298.8: Disorder - see also Disease mental (nonpsychotic) 300.9 psychotic (see also Psychosis) 298.9 brief 298.8 psychotic (see also Psychosis) 298.9 brief 298.8 Involution, involutional - see also condition psychosis 298.8 Menopause, menopausal (symptoms) (syndrome) 627.2 psychosis NEC 298.8 Psychosis 298.9 brief reactive 298.8 climacteric (see also Psychosis, involutional) 298.8 hysterical 298.8 acute 298.1 incipient 298.8 schizophrenic (see also Schizophrenia) 295.5 involutional 298.8 depressive (see also Psychosis, affective) 296.2 recurrent episode 296.3 single episode 296.2 melancholic 296.2 recurrent episode 296.3 single episode 296.2 paranoid state 297.2 paraphrenia 297.2 menopausal (see also Psychosis, involutional) 298.8 psychogenic 298.8 depressive 298.0 paranoid 298.4 acute 298.3 reactive (emotional stress) (psychological trauma) 298.8 brief 298.8 confusion 298.2 depressive 298.0 excitation 298.1 situational (reactive) 298.8 Stupor 780.09 psychogenic 298.8