2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Endocrine, Nutritional And Metabolic Diseases, And Immunity Disorders 240-279 > Diseases Of Other Endocrine Glands 250-259 > Disorders Of Adrenal Glands 255.* > 2008 ICD-9-CM Diagnosis 255.6 Medulloadrenal hyperfunction  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 Therefore, this code may be out of date.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 255.6 can be accessed here. 255.6 is a specific code that can be used to specify a diagnosis 255.6 contains 7 index entries View the ICD-9-CM Volume 1 255.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 255.6 also known as: Catecholamine secretion by pheochromocytoma Index entries containing 255.6: Hyperadrenalism (cortical) 255.3 medullary 255.6 Hyperfunction adrenal (cortex) 255.3 medulla 255.6 medulloadrenal 255.6 Hypersecretion medulloadrenal 255.6 Increase, increased function adrenal (cortex) 255.3 medulla 255.6 Secretion catecholamine, by pheochromocytoma 255.6 hormone by pheochromocytoma 255.6