Test ID: T3FR
CPT code: 84481
LOINC: 3051-0
Specimen Type: SERUM
Frequency: Setup: Mon-Fri; TAT 1-3 days
Instructions: 1.0 mL serum from SST tube, refrigerated. Min 0.5 mL.
Text: Useful clinically as a second or third level test of thyroid function where T3 thyrotoxicosis is suspected.
Methodology: Chemiluminescence Assay