Doctor's Data Inc

Free T4; serum

CPT Code

84439

Collection Container/Tube

Red-top tube (no additive), Alternative: Serum gel-separator tube

Transport Container/Tube

Clear plastic serum/plasma transfer vial

Minimum Specimen Volume

0.5 mL

Rejection Criteria

Gross hemolysis

Stability Information

Room temperature: 10 days
Refrigerated: 14 days
Frozen: 30 days
37°C/99°F: 1 day

Methodology

Chemiluminesescent Immunoassay

Turnaround Time

2 - 3 days

Reference Intervals

Sex Age
Both 0-199 years .6-1.3 ng/dL