Testosterone, Free (Dialysis) and Total, MS
Order Code: FTEST
Test Summary
Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.
Aliases
- F Testo
- Free & Total Testosterone
- LC/MS/MS
- Testosterone Index
- Testosterone
- Total/Free
- Pediatric
- Dialyzable Testosterone
- Fractionated Testosterone
- Free and Unbound Testosterone
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1.8 mL serum
Minimum Volume
0.9 mL
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.
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Refrigerated
Specimen Stability
- Room Temperature = 7 days
- Refrigerated = 21 days
- Frozen = 2 years
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) or lithium heparin (green-top) tube
Unacceptable Specimens
Gross hemolysis • Grossly lipemic
Order Code
FTEST
EPIC (Premier) Code
LAB380
Includes
Testosterone, Total, MS and Testosterone, Free (Dialysis)
CPT Code
- 84402
- 84403
Billing Code
- 670312
- 670313
CPT Statement
Methodology
Chromatography / Mass Spectrometry; Equilibrium Dialysis; Calculation
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. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Department
Reference Testing
Reference Range
See Laboratory Report
Setup Schedule / Expected Turnaround Time
Daily; Report available: 4 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1.8 mL serum
Minimum Volume
0.9 mL
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.
Patient Preparation
N/A
Storage
Plastic screw-cap vial
Transport Temperature
Refrigerated
Specimen Stability
- Room Temperature = 7 days
- Refrigerated = 21 days
- Frozen = 2 years
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) or lithium heparin (green-top) tube
Unacceptable Specimens
Gross hemolysis • Grossly lipemic
Result Information
Methodology
Chromatography / Mass Spectrometry; Equilibrium Dialysis; Calculation
Testing Laboratory
N/A
Reference Range
See Laboratory Report
Setup Schedule / Expected Turnaround Time
Daily; Report available: 4 days