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T3 Free, Tracer Dialysis

Test Code
36598


CPT Codes
84480, 84481

Includes
Free T3 and T3, Total


Preferred Specimen
1 mL serum


Minimum Volume
0.5 mL


Transport Temperature
Room temperature


Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 28 days


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Moderate hemolysis


Methodology
Equilibrium Dialysis by RIA • Immunochemiluminescence

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Sun-Thurs; Report available: 4-7 days


Clinical Significance
T3 measurements are used to diagnose hyperthyroidism. This test can also be used to clarify thyroid status in the presence of possible protein-binding abnormalities.




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.