T4 (Thyroxine), Free, Plasma or Serum*

Important Note

*This test is orderable in Cerner as Free T4

Specimen Type: Blood
Container/Tube:

Preferred: Light-green top (lithium heparin gel or green-yellow)

Specimen Fill Volume: Full tube

Collection Instructions:

1. Send specimen in original tube.

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

Roche Cobas

Rutland Regional Medical Center Laboratory

Refrigerated

0.92-1.68 ng/dL

Daily

Analytical Time:

1 day

Available Stat

CPT 84439

LOINC 3024-7

Order Code: RMCT4FREE

Result Code: RMCL800386

Result Name: T4 Free