Specimen Requirements
Title
THYROID PANEL
Specimen Requirement
One (1) SST, spin tube and ship or refrigerate.
Methodology
Stability
Reference Range
PANEL
Thyroid Testing Update: Effective 02/01/2026, T3 Uptake will be discontinued and replaced with Free T4 testing. Free T4 more directly reflects active thyroxine levels and supports clearer clinical interpretation than older, indirect binding assessments. (Click here for more information)