Endocrinologists are medical doctors who specialize in the diagnosis and treatment of diseases of the endocrine glands, which regulate hormones.

Endocrinologists are internists with additional training in endocrinology. They often treat diabetes and thyroid disorders. They may further specialize in treating specific age groups, such as pediatric endocrinologists, who only treat children.

Endocrinologists can be board-certified through the Board of Internal Medicine, which is recognized by the American Board of Medical Specialties.