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Laboratory Test Directory

Thyroxine-Binding Globulin (TBG), Serum


Name Method Department Units
Thyroxine Binding Globulin Solid-Phase Chemiluminescent Assay
Send Out mcg/mL

Specimen Requirements

Serum Spun

Container Type Container Size Specimen Volume

Red tube, (no anticoagulant), No Gel

3 mL 1 mL

Gold tube, (SST) with Gel

3.5 mL 1 mL

Red Tube (no anticoagulant) with Gel

3 mL 1 mL

Refrigerated - 7 day(s)
Frozen - 30 day(s)

Specimen Preparation

  • Centrifuge within 2 hours, separate supernatant and refrigerate
  • Transport to laboratory as soon as possible

Reasons for Rejection

  • Gross hemolysis
  • Wrong collection tube
  • Serum or Plasma received at room temperature

CPT Code

  • 84442