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Test Code TT4 T4, Total

Additional Codes

EMR Interface Order Code: 27500

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)

Reference Ranges

Male and female: 4.5-12.6 ng/dL

Turnaround Time

24 hours

Day(s) and Time(s) Performed

Test performed daily

CPT Code

84436

Units of Measure

ug/dL