Specimen Requirements
Title
Accutype IL28B
Specimen Requirement
5mL whole blood collected in an EDTA (lavender top) tube; 2mL min.
Methodology
Stability
Refrigerated: 8 Days
Reference Range
By Report*
Turnaround
6 Days
Clinical Use
Test Code
IL28Q
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.