TTFB
Testosterone, Total and Bioavailable
EPIC Test Procedure Code: LAB3605
Performing Lab:
Referral Laboratory
Container Type:
Plain red top or serum gel tube
Specimen Type:
Serum
Preferred Volume:
1.5 mL
Minimum Volume:
1 mL
Specimen Processing:
The serum must be separated from the cells within 45 minutes of collection.
Store and Transport:
Frozen
Stability:
Frozen - 677 days
Refrigerated - 7 days
Room Temperature - 2 days
CPT Codes:
84403 - Testosterone Total (EAP 30040548)
84410 - Testosterone Bioavailable (EAP 30040549)
Method:
High-pressure liquid chromatography (HPLC) tandem spectrometry ammonium sulfate precipitation of SHBG bound fraction