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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Symptoms, Signs, And Ill-Defined Conditions 780-799 > Symptoms 780-789 > General Symptoms 780.* > 2007 ICD-9-CM Diagnosis 780.97 Altered mental status  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 Therefore, this code may be out of date.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 780.97 can be accessed here. 780.97 is a specific code that can be used to specify a diagnosis 780.97 contains 2 index entries View the ICD-9-CM Volume 1 780.* hierarchy 780.97 also known as: Change in mental status Index entries containing 780.97: Alteration (of), altered mental status 780.97 amnesia (retrograde) 780.93 memory loss 780.93 Change(s) (of) - see also Removal of mental (status) NEC 780.97 due to or associated with physical condition - see Syndrome, brain