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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 255.10 Primary aldosteronism  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 Therefore, this code may be out of date.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 255.10 can be accessed here. A condition caused by the overproduction of ALDOSTERONE. It is characterized by sodium retention and potassium excretion with resultant HYPERTENSION and HYPOKALEMIA. Primary hyperaldosteronism caused by the excess production of ALDOSTERONE by an ADENOMA of the ZONA GLOMERULOSA or CONN ADENOMA. 255.10 is a specific code that can be used to specify a diagnosis 255.10 contains 4 index entries View the ICD-9-CM Volume 1 255.* hierarchy 255.10 also known as: Aldosteronism NOS Primary aldosteronism, unspecified 255.10 excludes: Conn's syndrome (255.12) Index entries containing 255.10: Aldosteronism (primary) 255.10 congenital 255.10 familial type I 255.11 glucocorticoid-remediable 255.11 secondary 255.14 Hyperaldosteronism (atypical) (hyperplastic) (normoaldosteronal) (normotensive) (primary) 255.10 secondary 255.14 Hyporeninemia, extreme 790.99 in primary aldosteronism 255.10