abcdefghijklmn
opqrstuvwxyz
Test Menu
Test Change Details
Allergy & Immunology
Cardiology & Coagulation
Dermatopathology
Endocrinology
Gastroenterology
Genetics
Hepatology
Infectious Disease
Microbiology
Nephrology
Neurology
Oncology
Pathology
Pediatrics
Rheumatology
Toxicology
Urology
Women's Health
3238: TBG (Thyroxine Binding Globulin) Print View
Thyroxin Binding Globulin IA  Both < 18 years: Call Client Services
Male >= 18 years: 12.7 - 25.1
Female >= 18 years: 13.5 - 30.9 
mcg/mL 

PRIMARY
1 Serum 1 (0.5) mL   Room Temperature - 7 Day(s)/Refrigerated - 7 Day(s)/Frozen - 28 Day(s)  
ALTERNATE

Thyroxine-binding globulin (TBG), a glycoprotein produced in the liver, binds both thyroxine (T4) and triiodothyronine (T3) with high affinity. Because TBG accounts for 76% of plasma protein thyroxine-binding activity, an increase or decrease in its circulating level alters total concentrations of T4 and T3 in blood, leading to potential confusion with true thyroid gland dysfunction. A number of diseases and medications, as well as inherited alterations in TBG gene expression, can change the serum TBG concentration. Measurement of TBG is useful in distinguishing quantitative TBG derangements from thyroid dysfunction. This analyte 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.
Setup Schedule
Wednesday, Saturday

Reported (Analytical Time)
Same day

CPT Code
84442

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Transport Temperature: Room Temperature






1996 - 2017 Quest Diagnostics Nichols Institute of Valencia
For test information, please call Client Services at 800-421-4449.

San Francisco Web Design & Database