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Test Code FT4 T4 (Thyroxine), Free

Methodology

Chemiluminescence

Specimen Requirements

Please use preferred tube types whenever possible.

Preferred Container/Tube Type: Green Top (Lithium Heparin) Tube

Alternate Serum Separator Tube (SST)

Transport refrigerated.

Day(s) Test Set Up

Monday through Sunday

Reference Values

0.9-1.7 ng/dL

Test Classification and CPT Coding

84439

Performing Laboratory

Beebe Healthcare Laboratory

Performing Location

Margaret H. Rollins Laboratory
South Coastal Campus Laboratory 
Specialty Surgical Hospital Laboratory

Specimen Tube Color

  Tube Cap Color Tube Name
Primary  Mint Green Mint Green Lithium Heparin
Alternate   Gold Serum Separator Tubes (SST)