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Laboratory Test Detail

Last Updated: December 5, 2023 @ 10:13 am

5025

Testosterone, Free + Total

Specimen:Collect:
  • One SST

Also Acceptable:
  • One Green Top (Li Heparin)
  • One Lavender (EDTA)
  • One Pink Top (EDTA)
  • One Red Top
Submit:
  • 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable:
  • 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Allow specimen to clot completely at room temperature
  • Avoid Repeated Freeze/Thaw Cycles
  • Minimize air exposure
  • Separate from cells ASAP
  • Specimen should be collected between 6-10 a.m.
    For patients receiving therapy with high biotin doses (>5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Stability:Ambient: 8 Hour(s); Refrigerated: 3 Day(s); Frozen: 1 Month(s); Incubated: Unacceptable
Methodology:
  • Electrochemiluminescence Immunoassay (ECLIA)
Performed:Mon-Fri
Reported:1-3 Day(s)
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.
CPT Codes:
  • 84270
  • 84403
Interpretive Data:Please see report for interpretive data.

Biotin in specimens taken from patients on high-dose biotin therapy or supplements may intefere with at least one test in this panel and cause inaccurate test results. It is recommended that for patients receiving therapy with high biotin doses (> 5 mg/day), no laboratory test specimen should be taken until at least 8 hours after the last biotin administration.

Please Note: Sex HB Globulin, Free Testosterone, and %Free Testosterone reference range changes as of 11/7/2019.
Components:
  • 2179 - TESTOSTERONE
  • 5020 - FREE TESTOSTERONE
  • 5023 - %FREE TESTO
  • 5024 - SEX HB GLOBULIN
  • 1021 - ALBUMIN
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