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- Ordering Info
To view specimen requirements and codes please select your laboratory:
Not sure which laboratory serves your office? Call us 1-866-MYQUEST (1-866-697-8378)
2.8 mL serum collected in a red-top tube (no gel)
Please specify age and sex on test request form.
Plastic screw-cap vial
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 2 years
Gross hemolysis • Gross lipemia • Serum Separator Tube (SST®)
Calculation (CALC) • Immunochemiluminometric Assay (ICMA) • Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) • Spectrophotometric
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.
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
Set up: Mon-Fri a.m.; Report available: 2 days
|Adult||Males (pg/mL)||Females (pg/mL)|
|Pediatric||Males (pg/mL)||Females (pg/mL)|
|<1 Year||Not available||Not available|
The concentration of free testosterone is derived from a mathematical model using total testosterone by LC/MS/MS, sex hormone binding globulin, and albumin.
Test is helpful in assessing testicular function in males and managing hirsutism and virilization in females.
The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.NOTE: The codes listed in the table below are not orderable Test Codes.
|Result Name||LOINC Code||Component Name|
|15983||Testosterone, Total, MS||2986-8||Testosterone|
|30740||Sex Hormone Binding Glob||13967-5||Sex hormone binding globulin|
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
The CPT codes provided 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 payer being billed.
LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.