TSI Test in Maine
TSI Test can be requested without a referral, and this overview covers what to expect. The TSI (Thyroid-Stimulating Immunoglobulin) test is a blood test that measures antibodies that can overstimulate the thyroid gland. It is most often ordered to help diagnose Graves' disease, an autoimmune condition that causes hyperthyroidism, and to monitor treatment response. Across Maine, part of New England, the tsi test can be ordered directly and collected at a certified site — no referral required.
- Sample type
- blood
- Category
- Thyroid
- Turnaround
- 1-3 business days
- Price
- $119
- Referral
- Not required
The TSI (Thyroid-Stimulating Immunoglobulin) test is a blood test that measures antibodies that can overstimulate the thyroid gland. It is most often ordered to help diagnose Graves' disease, an autoimmune condition that causes hyperthyroidism, and to monitor treatment response.
What it measures
- TSI level — The amount of thyroid-stimulating immunoglobulin in the blood; higher levels suggest Graves' disease.
- TSI index — A calculated ratio that compares your TSI level to a reference standard, helping interpret results.
- TSI percentage — Sometimes reported as a percentage of a normal reference range, indicating relative antibody activity.
- Thyroid-stimulating antibody (TSAb) — A related antibody that may be measured alongside TSI to assess thyroid stimulation.
Who it is for
A doctor typically orders a TSI test when you have symptoms of hyperthyroidism, such as unexplained weight loss, rapid heartbeat, or tremors, or when other thyroid tests suggest Graves' disease.
Preparation
No fasting or special preparation is needed for a TSI test. You can eat and drink normally before your blood draw.
Results and what they mean
Results are usually reported as a number or percentage, with a reference range provided by the lab. Your clinician will interpret your TSI level along with your symptoms and other thyroid tests. This information is general and not a substitute for medical advice.
Requesting the TSI Test in Maine
Order online, choose a certified collection site in Maine, and review results through a secure portal. No referral is required, and orders are processed confidentially. Because the region is tightly woven, short distances between towns that keep most people within an easy drive of a draw site — worth planning around when you book.
Frequently asked questions
What does a high TSI level mean?
A high TSI level often points to Graves' disease, but only your doctor can confirm a diagnosis after reviewing all your test results and symptoms.
Do I need to fast before a TSI test?
No, fasting is not required. You can eat and drink as usual before the blood draw.
How long does it take to get TSI test results?
Results are typically available within 1 to 3 business days, though this can vary by laboratory.
Can TSI levels change over time?
Yes, TSI levels can rise or fall with treatment or over the course of the condition. Your doctor may repeat the test to monitor changes.
TSI Test by city in Maine
- TSI Test in Portland
- TSI Test in Lewiston
- TSI Test in Bangor
- TSI Test in South Portland
- TSI Test in Auburn
- TSI Test in Biddeford
- TSI Test in Sanford
- TSI Test in Saco
- TSI Test in Westbrook
- TSI Test in Augusta
- TSI Test in Waterville
- TSI Test in Brewer
- TSI Test in Presque Isle
- TSI Test in Bath
- TSI Test in Ellsworth
- TSI Test in Caribou
- TSI Test in Old Town
- TSI Test in Rockland
- TSI Test in Belfast
- TSI Test in Gardiner
- TSI Test in North Windham
- TSI Test in Lisbon Falls
- TSI Test in York Harbor
- TSI Test in South Berwick
- TSI Test in Lisbon
- TSI Test in South Eliot
- TSI Test in Calais
- TSI Test in Lake Arrowhead
- TSI Test in Cumberland Center
- TSI Test in Hallowell
- TSI Test in Cape Neddick
- TSI Test in South Paris
- TSI Test in Dunstan
- TSI Test in Falmouth Foreside
- TSI Test in Veazie
- TSI Test in Steep Falls
- TSI Test in Eastport
- TSI Test in West Kennebunk
- TSI Test in Cornish
- TSI Test in Kittery Point