Test ID: FT4
CPT code: 84439
LOINC: 3024-7
Specimen Type: Red Gel or plain red top
Frequency: Setup: Daily; TAT <24 hrs
Instructions: SST(0.3mL serum min).
Text: Gives more accurate picture of thryoid status in patients with abnormal T4-binding globulin levels such as those pregnant or receiving treatments with estrogens, androgens, dilantin, or salicylates.
Methodology: Solid Phase enzyme labeled chemiluminescent competitive immunoassay