Testosterone, Total, MS

Message
Do not collect in SST


Test Code
TESTOST MS


Quest Code
15983


Alias/See Also
Testosterone for Pediatric and Females


CPT Codes
84403

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


Minimum Volume
0.5 mL serum collected in a red-top tube (no gel)


Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) tube 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 Temperature
Refrigerated


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

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
Age Males (ng/dL) Females (ng/dL)
Cord Blood*  17-61  16-44
1-10 Days*  ≤187  ≤24
11-30 Days Not established Not established
1-2 Months*  72-344  ≤17
3-4 Months*  ≤201  ≤12
5-6 Months*  ≤59  ≤13
7-11 Months*  ≤16  ≤11
1-5 Years  ≤5  ≤8
6-7 Years  ≤25  ≤20
8-10 Years  ≤42  ≤35
11 Years  ≤260  ≤40
12-13 Years  ≤420  ≤40
14-17 Years  ≤1000  ≤40
≥18 Years  250-1100  2-45
*Data from J Clin Invest 1974;53:819-828 and J Clin Endocrinol Metab 1973;36:1132-1142


Clinical Significance
Helpful in assessing testicular function in male and managing hirsutism, virilization in females.


Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042



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.