Starting at
$59
Walk-In Lab
Lowest PriceOnlineTri-iodothyronine (T3) Free Serum Test
Order the Tri-iodothyronine (T3) Free Serum Test to evaluate thyroid function for those who have symptoms of an abnormal thyroid function or already have a diagnosed condition. It also can be used as a follow-up to an abnormal thyroid test to get further insights.
Updated 7/22/2025
$59
Order TestPart of These Panels
DirectLabs
OnlineFree T's Plus TSH
Free T3, Free T4 and TSH
Updated 7/22/2025
$69
Order PanelDirectLabs
OnlineFree T's Plus TSH and Thyroid Antibodies
Free T3, Free T4, TSH, Thyroglobulin Antibodies and TPO
Updated 7/22/2025
$138
Order Panel