Diabetes Mellitus is a chronic disease characterized by high sugar levels in the blood. It is caused by deficiency of the hormone Insulin (Type I) or resistance to the action of the Insulin (Type II). Diabetes mellitus can cause damage to various organ systems including the kidneys, eyes, nerves and blood vessels. It is the leading cause of chronic kidney disease and end stage renal disease in the United States. Controlling diabetes can help decrease this damage to the various organs.