T4 (Thyroxine), Total

What it measures

• T4 (Thyroxine), TotalLOINC 3026-2
• Free T4 Index (T7)LOINC 32215-6

Specimen

Specimen

1 mL serum

Minimum volume

0.5 mL

Also accepted

Plasma collected in: Sodium heparin (green-top) or lithium heparin (green-top) tube

Container

Serum separator tube (SST)

Temperature

Room temperature

Note: Free T4 Index (T7) will only be calculated and reported if test code code 861 (T3 Uptake) is ordered as well.

Turnaround

Set up: Mon-Sat; Report available: 3 days

Billing

CPT 84436