Test Code RMCT4FREE T4 (Thyroxine), Free, Plasma or Serum*

Important Note

*This test is orderable in Cerner as Free T4

Enzyme Immunoassay (EIA)

Rutland Regional Medical Center Laboratory

Specimen Type: Blood
Container/Tube: Serum

Preferred: Light-green top (lithium heparin gel)

Acceptable: Gold top, serum gel

Specimen Volume: Full tube

Specimen Minimum Volume: 2 mL

Collection Instructions:

1. Send specimen in original tube.

2. If there is a delay in transport of >1 hour, centrifuge tube.

Refrigerated

0.59-1.61 ng/dL

Daily

Analytical Time:

1 day

Available Stat

CPT 84439

LOINC 3024-7

Order Code: RMCT4FREE

Result Code: RMCL800386

Result Name: T4 Free