Testosterone, Free (Dialysis) and Total, MS

Test Code

36170

CPT Codes
84402, 84403

Includes

Testosterone, Total, MS and Testosterone, Free (Dialysis)

Preferred Specimen

1.8 mL serum

Minimum Volume

0.9 mL

Other Acceptable Specimens

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

Instructions

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.

Transport Container

Plastic transport tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic

Methodology
Chromatography/Mass Spectrometry • Equilibrium Dialysis • Calculation (CALC)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Daily; Report available: 4 days

Reference Range

See Laboratory Report

Clinical Significance

Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.