Diabetes mellitus is a specific type of diabetes mellitus, except for type 1 diabetes mellitus, type 2 diabetes mellitus, and gestational diabetes mellitus. These include genetic disorders such as adult-onset diabetes in young adults, diabetes with mitochondrial mutations, and endocrine disorders that cause secondary elevations in blood glucose, such as acromegaly, Cushing’s syndrome, pheochromocytoma, hyperthyroidism, and aldosteronism. There are also some medications that can cause diabetes, such as glucocorticoids, beta-blockers, and thiazide diuretics can also cause diabetes. Some viral infections, such as rubella virus infection and cytomegalovirus infection that cause diabetes, are within the category of specific types of diabetes.