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HelpTest Code TT4 T4, Total
Collection Container
Serum gel
Specimen Required
Serum
Other Acceptable Specimen Types
Heparinized and EDTA plasma
Specimen Volume
1 mL
Minimum Specimen Volume
0.5 mL
Transport Temperature
Refrigerate
Specimen Stability
Room temperature: 4 days, Refrigerated: 8 days, Frozen: 12 months freeze/thaw cycle 1
Methodology
Electrochemiluminescence immunoassay (ECLIA)
Days and Times Performed
Test performed daily
Turnaround Time
24 hours
Reference Ranges
Male and Female: 4.5 - 12.6 ng/dL
Units of Measure
ug/dL
CPT Code
84436
EMR Interface Order Code
27500