Test ID: QG161
CPT code: 84270, 84403, 82040
LOINC:
Specimen Type: Red or SST
Frequency: 4 – 6 days
Instructions: 2.8 mL Serum from Red or SST, Ambient. Min 2 mL.
Text: Free testosterone assessment is recommended as a primary or secondary measure of androgen activity in men & women. Determination of free testosterone can be of value in men with borderline total testosterone because alterations in SHBG levels can markedly affect the concentration of biologically available free testosterone.
Methodology: Albumin: Colorimetric Testosterone: Liquid chromatography/tandem mass spectrometry (LC/MS-MS) SHBG: Electrochemiluminescence immunoassay