Will a uptake scan tell me if i have graves' disease?

Yes if you suspect: If you have signs and symptoms of graves disease and blood test confirms evidence of hyperthridism including tsi&trab antibodies, radioactive iodine scan will help in the diagnosis of graves disease.

Antibodies: Graves' disease is diagnosed by seeing graves' antibodies in the blood. An uptake can only tell how active the gland is but it cannot confirm graves' disease. A high uptake and positive TSH receptor antibodies will confirm active graves' disease.

Confirms diagnosis: In combination with blood work for free T4 and TSH thyroid uptake and scan confirm diagnosis of Graves disease. Scan shows size and configuration of gland. Localized problem versus diffuse abnormality.