Test Code FT4 T4 (Thyroxine), Free, Serum
Additional Codes
Sunrise Clinical Manager (SCM) Orderable: Free Thyroxine, Serum
AllScripts (AEHR) Orderable: Free T4
Performing Laboratory
Northwell Health Laboratories
Methodology
Electrochemiluminescence Immunoassay (ECLIA)
Specimen Requirements
Container/Tube: Gold-top tube(s)
Specimen: 1 mL of serum
Transport Temperature: Refrigerate
Stability: 5 Days Room Temperature
7 Days Refrigerated
30 Days Frozen
Reference Values
0.9-1.8 ng/dL
Test Classification and CPT Coding
84439
Day(s) and Time(s) Performed
Monday through Sunday, Continuously
Computer Interface Code
PDM # 5300445