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HelpTest 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.
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.
Specimen Transport Temperature
Refrigerate 5 days/Ambient 8 hours OK/Frozen OK
Day(s) Test Set Up
Monday through Sunday
Performing Laboratory
Chemistry-
St. Joseph's Medical Center Lab
SMDC Clinical Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab
Fargo Hospital Lab, St. Mary's - Detroit Lakes Hospital Lab
Test Classification and CPT Coding
84439
Reference Values
0.7-1.7 ng/dL