Test ID: ZG062
CPT code: 84402, 84403
LOINC:
Specimen Type: Red or SST
Frequency: 4 – 6 days
Instructions: 2.5 mL Serum from Red or SST, Refrigerated, Separate within 1 hour. Min 2 mL.
Text: Evaluates hirsutism and masculinization in women; evaluate testicular function in clinical states in which the testosterone-binding proteins may be altered (obesity, cirrhosis, thyroid disorders). The concentration of free testosterone is very low, typically <2% of the total testosterone concentration.
Methodology: Free: equilibrium ultrafiltration; Total: liquid chromatography/tandem mass spectrometry (LC/MS-MS)