Thyroid Binding Globulin TBG

Synonyms

Allscripts (AEHR) Order Name

Thyroxine-Binding Globulin (TBG), Serum

Sunrise Clinical Manager (SCM) Order Name

Thyroid Binding Globulin, Serum

EPIC Order Name

Thyroxine Binding Globulin

Clinical Info

Distinguish between high T4 levels due to hyperthyroidism and due to increased binding by TBG in euthyroid individuals who have normal levels of free hormones; document cases of hereditary deficiency or increase of TBG; work-up of thyroid disease.

Specimen Type

Blood

Container

Gold Top Tube

Collection Instructions

Container/Tube: Gold top(s) tube(s)
Specimen Volume: 0.5 mL (minimum volume: 0.35 mL) of serum
Transport Temperature: Refrigerated

Transport Instructions

Refrigerated

Specimen Stability

Methodology

Immunochemiluminometic Assay (ICMA)

Days Performed

Monday through Saturday

Performing Laboratory

LabCorp of America

CPT

84442

PDM

5901245

Result Interpretation

AGE	Male µ g/mL	Female µ g/mL
1-11 months≥	16 -33	18 - 32
1-3 years	16-32	19-34
4-6 years	17-30	18-31
7-12 years	17-29	15-29
13-18 years	13-26	14-29
>18 years	13-39	13-39

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