Service Description

The Free T4 test measures the level of thyroxine (T4) in the blood, a key thyroid hormone that helps regulate metabolism, growth, and energy levels. Why it’s done: To evaluate thyroid function and hormone balance To help diagnose hyperthyroidism or hypothyroidism To monitor thyroid medication or therapy To investigate symptoms such as fatigue, weight changes, or temperature sensitivity Specimen Type: Blood draw Turnaround Time: Typically 1–3 business days Collection Available: In-office or mobile blood draw services