Test Directory
Testosterone, Total and Free, Serum
Print this pageUpdated Test Information:
| Test Description |
Testosterone, Total and Free, Serum
|
|
|---|---|---|
| Synonym(s) |
Testosterone, Total and Free
|
|
| Test ID |
TGRP
|
|
| 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 |
|
| Specimen Type |
Serum
|
|
| Specimen Requirements |
Red Top
|
|
| Stability |
Refrigerated (preferred) 14 days
Frozen 60 days |
|
| Unacceptable Specimen Conditions |
Gross hemolysis Reject
Gross lipemia OK Gross icterus OK Other Serum Gel |
|
| Methodology |
FRTST: Equilibrium Dialysis
TTST: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
|
| Estimated TAT |
3-5 days
|
|
| Testing Schedule |
Monday-Sunday
|
|
| Test Includes |
FRTST Testosterone, Free
TTST Testosterone, Total |
|
| CPT Code(s) |
84402
84403 |
|
| Minimum Sample Volume |
1 mL
|
|
| Reference Range File | View/Download File | |
| Performing Lab |
Mayo
|
|
| LOINC Code(s) |
2991-8, 2986-8
|
