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HelpOrder Code LAB111 Testosterone Total, Serum
Additional Codes
| Test Name in EPIC | EPIC Test Code | Mnemonic |
| RV Testosterone Total | LAB111 | TEST |
Useful For
In males testosterone measurement is used to investigate sexual dysfunction.
In females elevated concentration may indicate polycycstic ovaraian syndrome among other conditions.
Clinical symptoms of testosterone excess in females include infertility, amenorrhea, obesity, and hirsutism.
Specimen Requirements
Specimen Type: Serum
Collection Container/Tube:
Preferred: Serum SST tube
Acceptable: Plain, red-top tube
Specimen Volume: 2 mL
Pediatric (minimum) volume: 0.5 mL
Specimen Stability
| Specimen Type | Temperature | Stability |
| Plasma or Serum | Ambient | 4 hours |
| Refrigerated (preferred) | 7 days | |
| Frozen | 4 weeks |
Reference Values
Male
0-20 years: No established reference range
20-49 years: 132-813 ng/dL
>50 years: 71.8-623 ng/dL
Female
5.71-77.0 ng/dL (with normal menstrual cycle)
Specimens with biotin concentrations less than 10ng/mL demonstrated a less than or equal to 10% change in results. Specimens with various biotin concentrations interfere with the VITROS Testosterone test resulting in a bias as shown in the table below.
|
Testosterone* |
Bias** |
Biotin Level Tested (ng/mL) |
|||||||||
|
nmol/L |
ng/dL |
10 |
20 |
30 |
40 |
50 |
100 |
300 |
1200 |
3500 |
|
|
1.38 |
39.8 |
% |
-13.2 |
-23.1 |
-34.8 |
-33.6 |
17.8 |
321 |
1014 |
3080 |
5018 |
|
8.43 |
243 |
% |
-7.5 |
-15.6 |
-20.3 |
-20.8 |
-1.7 |
146 |
532 |
764 |
781 |
For diagnostic purposes, the results should always be assessed in conjunction with the patient's medical history, clinical examination, and other findings.
Day(s) Test Set Up
Monday through Friday
Performing Laboratory
Ridgeview Medical Center Laboratory
Test Classification and CPT Coding
84403