2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Organic Psychotic Conditions 290-294 > Dementias 290.* > 2008 ICD-9-CM Diagnosis 290.8 Other specified senile psychotic conditions  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 Therefore, this code may be out of date.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 290.8 can be accessed here. 290.8 is a specific code that can be used to specify a diagnosis 290.8 contains 2 index entries View the ICD-9-CM Volume 1 290.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 290.8 also known as: Presbyophrenic psychosis Index entries containing 290.8: Mania (monopolar) (see also Psychosis, affective) 296.0 senile 290.8 Psychosis 298.9 presbyophrenic (type) 290.8