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Testosterone, Free (Dialysis) and Total, MS
Test Code36170
CPT Codes
84402, 84403
Includes
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
Plasma collected in: Sodium heparin (green-top) or lithium heparin (green-top) tube
Instructions
Specify age and sex on test request form
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years
Refrigerated: 21 days
Frozen: 2 years
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Serum separator tube (SST)
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
Night Sets up 7 days a week.
Report Available
Reports in 4 days.
Clinical Significance
Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.