2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Nutritional Deficiencies 260-269 > Other And Unspecified Protein-Calorie Malnutrition 263.* > 2008 ICD-9-CM Diagnosis 263.1 Malnutrition of mild degree  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 Therefore, this code may be out of date.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 263.1 can be accessed here. 263.1 is a specific code that can be used to specify a diagnosis 263.1 contains 3 index entries View the ICD-9-CM Volume 1 263.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 263.1: Malnutrition (calorie) 263.9 degree first 263.1 mild 263.1 mild 263.1