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The Thyroid Stimulating Immunoglobulin (TSI) test is a simple blood test that looks for antibodies linked to an overactive thyroid from the immune system. It is also called the TSI antibody test or Graves antibody test. You can book at participating labs on LabFinder and choose a time that works for you.
This test, sometimes called a thyroid stimulating immunoglobulins test or a TSH receptor stimulating antibody test, checks for antibodies that can switch the thyroid on. If these antibodies are present, it can point toward Graves disease and help explain symptoms like fast heartbeat, weight loss, or feeling hot.
Common reasons: signs of an overactive thyroid such as shakiness, rapid pulse, or trouble sleeping. Diagnosis support: your doctor suspects Graves disease and wants antibody confirmation. During pregnancy: known Graves history and your care team wants to check antibody levels. After treatment: tracking antibodies over time to help guide care.
Check in with your ID and lab order. A tech cleans a small spot on your arm and draws a tube of blood. You may feel a quick pinch. A bandage is placed and you can head out. Plan for about 10 to 20 minutes at the lab.
Yes, this is a quick, routine blood draw and is considered very safe. You might feel a quick pinch, notice a small bruise, or feel a little lightheaded for a moment afterward, but those effects usually fade quickly. Be sure to tell the staff if you take blood thinners, have a bleeding disorder, or if you have fainted during blood draws before. They will take extra care to keep you comfortable. Very high dose biotin taken right before testing can affect some lab methods, so follow any instructions you receive.
Food and drink: fasting is not usually needed unless your doctor says so. Medications and supplements: bring a list and ask about high dose biotin; many labs prefer you avoid it for 24 hours. Hydration: drink water so veins are easy to find. Timing: come at the time your doctor suggests if they are comparing results over time. Bring any past thyroid test results if you have them.
Doctors use this test when checking Graves disease, hyperthyroidism, eye changes linked to thyroid disease, a goiter, and fast heartbeat or weight loss without trying. Results are read in context. Your doctor will review your results with your symptoms and history before suggesting next steps.
You can compare locations, see time slots, and book online at participating labs. It is easy to search for a convenient location in your area or by city or ZIP. Coverage varies by plan and provider. LabFinder helps you schedule fast so you can focus on feeling your best.
Book on LabFinder: find a lab today on our lab finder and request a test doctor guided.
The information on this page and throughout the LabFinder website and mobile app is for general informational purposes only. It is not intended to serve as medical advice, diagnosis, or treatment. For personalized medical advice or specific health concerns, please consult your healthcare provider directly.
Booking a Thyroid Stimulating Immunoglobulin (TSI) Test is easy using LabFinder. Just choose your location and enter your insurance information to find the closest Thyroid Stimulating Immunoglobulin (TSI) Test near you.
To make a same-day appointment for a Thyroid Stimulating Immunoglobulin (TSI) Test, just choose your location and your insurance information to find the closest Thyroid Stimulating Immunoglobulin (TSI) Test location near you. If there's availability for a same-day appointment at a nearby lab location, then you will be able to book it easily through LabFinder.
LabFinder allows you to easily schedule a Thyroid Stimulating Immunoglobulin (TSI) Test. You can search by location and insurance to easily book a Thyroid Stimulating Immunoglobulin (TSI) Test near you.
LabFinder allows you to easily make an appointment for a Thyroid Stimulating Immunoglobulin (TSI) Test online. To make an appointment for a Thyroid Stimulating Immunoglobulin (TSI) Test online, just choose your location and your insurance information to find the closest Thyroid Stimulating Immunoglobulin (TSI) Test near you.
Yes, you can get a Thyroid Stimulating Immunoglobulin (TSI) Test without insurance. LabFinder allows you to search and select "Self-Pay" when booking a Thyroid Stimulating Immunoglobulin (TSI) Test. While pricing for the test may not be immediately available, please check by calling the lab company directly for pricing.
