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TBG (Thyroxine Binding Globulin) (870X)
1 mL serum
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130
Set up: 1 day a week a.m.; Report available: 2 days
The measurement of TBG can be used to establish the presence of TBG deficiency or excess suggested by abnormal Total serum T4 and T3 concentrations in the presence of normal free levels of these hormones. Definitive documentation of a TBG derangement may avoid unnecessary diagnostic procedures and therapy in individuals with harmless congenital TBG anomalies, and in their relatives.
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
(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.)
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.