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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Other Disorders Of The Central Nervous System 340-349 > Other Conditions Of Brain 348.* > 2007 ICD-9-CM Diagnosis 348.31 Metabolic encephalopathy  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 Therefore, this code may be out of date.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 348.31 can be accessed here. Acquired or inborn metabolic diseases that produce brain dysfunction or damage. These include primary (i.e., disorders intrinsic to the brain) and secondary (i.e., extracranial) metabolic conditions that adversely affect cerebral function. 348.31 is a specific code that can be used to specify a diagnosis 348.31 contains 2 index entries View the ICD-9-CM Volume 1 348.* hierarchy 348.31 also known as: Septic encephalopathy 348.31 excludes: toxic metabolic encephalopathy (349.82) Index entries containing 348.31: Encephalopathy (acute) 348.30 metabolic (see also Delirium) 348.31 toxic 349.82 septic 348.31