Testosterone, Free

What it measures

• Testosterone, FreeLOINC 2991-8

Specimen

Specimen

2.8 mL serum

Minimum volume

1.3 mL

Also accepted

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

Container

Transport tube

Temperature

Room temperature

Specify age and sex on test request form. Red-top tube (no gel): Allow blood to clot at room temperature. Centrifuge to separate the serum from the cells and immediately pour serum into a plastic transport tube. Serum separator tube: Allow blood to clot at room temperature, centrifuge, and remove serum from the gel immediately (not to exceed 48 hours) by pouring serum into a plastic transport tube.

Turnaround

Set up: Mon-Fri

Billing

CPT 84402