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Test Code FT4 T4 (Thyroxine), Free, Serum

Performing Laboratory

Northwell Health Laboratories

Methodology

Electochemiluminescence

Reference Values

0.9-1.8 ng/dL

Test Classification and CPT Coding

84439

Specimen Required

Container/Tube: Gold-top tube(s)

Specimen: 1 mL of serum

Transport Temperature: Refrigerate

Day(s) and Time(s) Performed

Monday through Sunday

Computer Interface Code

PDM # 5300445