Test Code T4 Thyroxine (T4)

Specimen Type

Blood

Minimum Volume

1.0 mL

Container

Mint Green-Lithium Heparin
Plasma/Refrigerate

STAT Turnaround Time

60 Minutes

Routine Turnaround Time

4 Hours

Methodology

Chemiluminescent microparticle immunoassay (CMIA)

Reference Range

4.5-12.5 mcg/dL

CPT Code

84436