R94: Abnormal results of function studies

R94.6: Abnormal results of thyroid function studies

Examinations like these can help to determine how well the thyroid gland is working. The thyroid is a small organ at the bottom of the neck. The thyroid gland needs iodine to produce important messenger substances for the body. These messenger substances influence the heartbeat, digestion, and body temperature, among other things. You can look at blood for things like how many messenger substances the thyroid gland is producing.