THYROXINE BINDING GLOBULIN (TBG)

Test Code: L959

Specimen Collection: Serum

Component:
TBG

Method:
IA

Collection Notes: Grossly lipemic, grossly hemolyzed, and/or grossly icteric specimens are not acceptable.

Clinical Utility: TBG is elevated with estrogen therapy (especially oral contraceptive agents), during pregnancy and or hepatitis. Serum TBG may be decreased in cirrhosis, in the nephritic syndrome and by androgens.

CPT Code: 84442

Testing Location: Sent to reference lab

Specimen/Stability Type

Serum (1 mL)

Temperature:

Ambient 7 Days

Refrigerated 7 Days

Frozen 28 Days

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