3238 Thyroxine Binding Globulin

Components
NAME METHOD REFERENCE RANGE UNITS
Thyroxin Binding Globulin ICMA  view ref range  ug/mL 


Specimen Requirements
TYPE VOLUME TEMPERATURE INSTRUCTIONS
PRIMARY
1 Serum 1 (0.4) mL   Ambient - 7 Day(s), Refrigerated - 7 Day(s), Frozen - 2 Month(s)  


Clinical utility
Determine binding capacity for T4; document cases of hereditary deficiency of TBG, in work-up of thyroid disease, particularly in patients with low T4, high T3 (uptake) who clinically seem eumetabolic. Such patients may have hereditary anomalies of TBG and may not require treatment.


Reported: Same day

CPT Code: 84442