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HelpTest Code TT4 Total Thyroxine
Performing Laboratory
YRMC, Chemistry
Day(s) Test Set Up
Monday – Sunday
Specimen Requirements
Serum: Red Top/ Green Top (Heparin)
Specimen Transport Temperature
Ambient
LOINC Code
3026-2
Unit of Measure
ng/mL
Collection Instructions
Minimum Volume = 0.5 mL
Reference Values and Units
5.-5.55-11.0
Reportable Range
0.405-24.9
Methodology
Competitive Immunoassay Luminescence