Testosterone, Free (Dialysis) and Total, MS

Test Code

CPT Codes
84402, 84403

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

Preferred Specimen
1.8 mL serum collected in a red-top tube (no gel)

Minimum Volume
0.9 mL

Other Acceptable Specimens
1.8 mL plasma collected in: Sodium heparin (green-top) tube or lithium heparin (green-top) tube

Please specify age and sex on the test request form.

Transport Temperature
Room temperature

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

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum separator tubes (SST®) • Gross hemolysis • Gross lipemia

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 the U.S. Food and Drug Administration. 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.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.