Testosterone, Bioavailable and Total, Includes Sex Hormone-Binding Globulin (Adult Females, Children, or Individuals on Testosterone-Suppressing Hormone Therapy)
Provides a calculated value for bioavailable testosterone concentration using total testosterone measured by mass spectrometry. May be used to evaluate hyperandrogenism in children and cisgender females, monitor testosterone-suppressing hormone therapies (eg, antiandrogens or estrogens), evaluate testosterone status in individuals with protein-binding abnormalities, or evaluate hypogonadism in cisgender males.
Quantitative High Performance Liquid Chromatography-Tandem Mass Spectrometry/Electrochemiluminescent Immunoassay
The concentrations of free and bioavailable testosterone are derived from mathematical expressions based on constants for the binding of testosterone to albumin and/or sex hormone binding globulin.
New York DOH Approval Status
Collect between 6-10 a.m.
Serum separator tube or green (sodium or lithium heparin).
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.8 mL)
After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 6 months
|Testosterone by Mass Spec||
|Testosterone, Free by Mass Spec||
|Testosterone, Bioavailable by Mass Spec||
|Sex Hormone Binding Globulin||
Bioavailable testosterone concentration is calculated using total testosterone (measured by mass spectrometry) and the binding constant of testosterone and sex hormone-binding globulin (SHBG) and/or albumin.
For individuals on testosterone-suppressing hormone therapies (e.g., antiandrogens or estrogens), refer to cisgender female reference intervals. For a complete set of all established reference intervals, refer to ltd.aruplab.com/Tests/Pub/0081057.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
84402; 84403; 84270
|Component Test Code*||Component Chart Name||LOINC|
|0081058||Testosterone by Mass Spec||2986-8|
|0081096||Testosterone, Free by Mass Spec||49042-5|
|0081098||Testosterone, Bioavailable by Mass Spec||2990-0|
|0099375||Sex Hormone Binding Globulin||13967-5|