Test Directory
Testosterone, Total and Free, Serum
Print this pageUpdated Test Information:
Test Description |
Testosterone, Total and Free, Serum
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---|---|---|
Synonym(s) |
Testosterone, Total and Free
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Test ID |
TGRP
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General Information |
Useful for:
Alternative, second-level test for suspected increases or decreases in physiologically active testosterone (preferred: TTBS / Testosterone, Total and Bioavailable, Serum); indications: -Assessment of androgen status in cases with suspected or known sex hormone-binding globulin-binding abnormalities -Assessment of functional circulating testosterone in early pubertal boys and older men -Assessment of functional circulating testosterone in women with symptoms or signs of hyperandrogenism, but normal total testosterone levels -Monitoring of testosterone therapy or antiandrogen therapy in older men and in females |
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Specimen Type |
Serum
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Specimen Requirements |
Red Top
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Stability |
Refrigerated (preferred) 14 days
Frozen 60 days |
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Unacceptable Specimen Conditions |
Gross hemolysis Reject
Gross lipemia OK Gross icterus OK Other Serum Gel |
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Methodology |
FRTST: Equilibrium Dialysis
TTST: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
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Estimated TAT |
3-5 days
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Testing Schedule |
Monday-Sunday
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Test Includes |
FRTST Testosterone, Free
TTST Testosterone, Total |
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CPT Code(s) |
84402
84403 |
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Minimum Sample Volume |
1 mL
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Reference Range File | View/Download File | |
Performing Lab |
Mayo
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LOINC Code(s) |
2991-8, 2986-8
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