E00-E07: Disorders of thyroid gland

Disorders of the thyroid gland, a group of conditions under the codes E00-E07, involve problems with the thyroid, a small organ located in the front of your neck that controls how your body uses energy. These disorders can result in your thyroid producing either too much or too little of certain important hormones. Hyperthyroidism, an example of these disorders, is caused by the thyroid being overactive and releasing too many hormones. This can cause symptoms like rapid heart rate, unintended weight loss, and feeling overly warm. On the other hand, hypothyroidism is caused by an underactive thyroid, leading to fatigue, weight gain, and feeling cold. The severity of symptoms can increase over time and the disorders can affect many different systems in your body, including heart rate, energy levels, and body temperature. They can be caused by a variety of factors, such as autoimmune disease, benign tumors, or thyroid surgery.