Endocrinology is the medical discipline dealing with regulation of body functions by hormones and other biochemicals and treatment of endocrine system imbalances. The specialty focuses on endocrine organs including the pituitary, thyroid, adrenals, ovaries, testes, and pancreas.

An endocrinologist is a doctor who specializes in treating disorders of the endocrine system, such as diabetes, hyperthyroidism, and many others.