Sign in →

Test Code LAB1400 T4 (Thyroxine), Free, Plasma or Serum

Additional Codes

Test Name in EPIC EPIC Test Code Mnemonic
T4, FREE LAB1400 FT4

 

Methodology

Chemiluminescent Microparticle Immunoassay (CMIA)

Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

 

Specimen Type: Plasma

Container/Tube: Light-green top (lithium heparin gel)

Specimen Volume: 0.5 mL

Specimen Minimum Volume: 0.15 mL

Additional Information:

1. Avoid repeated freeze/thaw cycles.

2. Label specimen appropriately (plasma).

 

Alternate:

 

Specimen Type: Serum

Container/Tube: Serum gel

Specimen Volume: 0.5 mL

Specimen Minimum Volume: 0.15 mL

Additional Information:

1. Avoid repeated freeze/thaw cycles.

2. Label specimen appropriately (serum).

 

 

Specimen Transport Temperature

Refrigerate 5 days/Ambient 8 hours OK/Frozen OK

Day(s) Test Set Up

Monday through Sunday

Reference Values

0.7-1.7 ng/dL

Test Classification and CPT Coding

84439

Performing Laboratory

Chemistry-

Central Region: St. Joseph's Medical Center Lab

East Region: SMDC Clinical Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab

West Region: St. Mary's - Detroit Lakes Hospital Lab