TESTOSTERONE FREE, FEMALES OR CHILDREN

Specimen Required
Draw blood in a SST. Centrifuge, separate serum from cells within 2 hours of collection. Send 1.0 mL serum (0.8 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top
Plasma: Sodium or lithium heparin

Rejection Criteria
Plasma: EDTA

Methodology
Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry/Electrochemiluminescent Immunoassay

Stability
Room temperature: 24 hours; Refrigerated: 1 week; Frozen: 6 months

Reference Range
By report
Total Testosterone and SHBG are measured and free testosterone is estimated from these measurements.

Performed
Sunday-Saturday

Turnaround Time3-6 days
Test CodeTEFFC
CPT-4 Code (s)
84402
LOINC Codes
2991-8

Warde
Medical
Laboratory