Testosterone Free and Total by ED/LC-MS/MS (Free) and LC-MS/MS (Total), Adult Males
Laboratory reference method for determining free and total testosterone in men. Total or free testosterone is generally adequate for most evaluations of suspected hypogonadism.
Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
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. Transport 1 mL serum or plasma. (Min: 0.4 mL)
After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 months
|Male Free Testosterone, pg/mL|
|18 years and older: 47-244 pg/mL|
|Male Total Testosterone, ng/dL|
|18-39 years: 300-1080 ng/dL
40-59 years: 300-890 ng/dL
60 years and older: 300-720 ng/dL
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|2003247||Testos Free Adult Male ED/LC-MS/MS||2991-8|
|2004245||Testosterone Total, LC-MS/MS, Males||2986-8|
- Direct dialysis (Testosterone Free & Total by ED/LC-MS/MS (Free) and LC-MS/MS (Total), Adult Males)
- Total and Free (Testosterone Free & Total by ED/LC-MS/MS (Free) and LC-MS/MS (Total), Adult Males)