Table Test Results That Suggest Addison Disease Test Result Blood chemistry Serum sodium < 135 mEq / L (< 135 mmol / L) Serum potassium > 5 mEq / L (> 5 mmol / L) Ratio of serum sodium: potassium < 30: 1 Plasma glucose, fasting < 50 mg / dL (< 2.8 mmol / L) Plasma bicarbonate < 15 - 20 mEq / L (< 15 - 20 mmol / L) BUN (blood urea nitrogen) > 20 mg / dL (> 7.1 mmol / L) Hematology Hematocrit Elevated White blood cell count Low Lymphocytes Relative lymphocytosis Eosinophils Increased Imaging X-ray or CT Evidence of Calcification in adrenal area Renal tuberculosis Pulmonary tuberculosis Differential diagnosis The varied manifestations of Addison disease can also be caused by numerous other disorders.