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T4, Total

Test Code
TT4


CPT Codes
84436

Preferred Specimen
1.0 mL serum


Transport Container
Gold Top Tube/Serum Separator Tube.


Transport Temperature
Room temperature or refrigerate.


Methodology
Electrochemiluminescence

Reference Range
4.6-12.0 µg/dL


Clinical Significance
Total T4 determination is utilized for the following indications: the detection of hyperthyroidism, the detection of primary and secondary thyroidism, and the monitoring of TSH-suppression therapy.




The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.