Sign in →

Test Code T4FREE T4 (Thyroxine), Free

Additional Codes

Hospital Ordering Code
LAB127   T4, FREE

Specimen Requirements

Submit only 1 of the following specimens:

 

Specimen Type: Plasma

Container/Tube: Green top (lithium heparin)

Specimen Volume: 0.5 mL

Additional Information: Label specimen appropriately (plasma).

 

Specimen Type: Serum

Container/Tube: Serum gel

Specimen Volume: 0.5 mL

Additional Information: Label specimen appropriately (serum).

Performing Laboratory

Unity Point-Sioux City-Chemistry

CPT

84439

Methodology

Electrochemiluminescence

Specimen Transport Temperature

Ambient

 

Stable for 7 days at 2-8 °C, 30 days at -20 °C.5 Freeze only once.

Day(s) Test Set Up

Monday through Sunday