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HelpTest Code TTEB Testosterone, Total
Specimen and Container/Tube
Specimen Type: Serum
Preferred Specimen: Red Top
Other Acceptable specimens: None
Volume
Preferred Volume: 4.0 mL
Minimum Volume: 0.2 mL
Specimen Stability
|
Storage Temperature |
Stability |
|
Room temperature |
7 days |
|
Refrigerated |
7 days |
|
Frozen |
3 months |
Collection Instructions
Collect specimen per standard laboratory collection procedures.
Specimen Handling and Transport Instructions
UCMC Onsite Instructions:
Collect specimen per standard collection procedure and send to laboratory immediately.
UCMC Offsite and UC MedLab Outreach Instructions:
- Samples should be centrifuged within 2 hours of collection.
- Centrifuge specimens at >2500 x g for 10 minutes at room temperature.
- Aliquot sample into plastic transport tube containing a minimum of 0.2 mL of specimen.
- Samples must be sent room temperature at 15-25oC.
Rejection Criteria
- Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits.
- Specimens that are clotted or grossly hemolyzed.
- Specimens that were transported unspun/whole blood and draw time is greater than 6 hours.
Reference Values
|
Test |
Age |
Sex |
Reference Range |
|
Total Testosterone |
0 - 5 months |
Male |
75 - 400 ng/dL |
|
6 months - 9 years |
<20 ng/dL |
||
|
10 - 11 years |
<130 ng/dL |
||
|
12 - 13 years |
<800 ng/dL |
||
|
14 years |
<1,200 ng/mL |
||
|
15 - 16 years |
100 - 1,200 ng/dL |
||
|
17 - 18 years |
300 - 1,200 ng/dL |
||
|
19 - 55 years |
240 - 950 ng/dL |
||
|
56 - 75 years |
180 - 800 ng/dL |
|
Test |
Age |
Sex |
Reference Range |
|
Total Testosterone |
0 - 5 months |
Female |
20 - 80 ng/dL |
|
6 months - 9 years |
<20 ng/dL |
||
|
10 - 11 years |
<44 ng/dL |
||
|
12 - 16 years |
15 - 60 ng/dL |
||
|
17 - 40 years |
20 - 60 ng/mL |
||
|
41 - 60 years |
<60 ng/dL |
||
|
Post-menopausal (>60 yrs) |
5 - 70 years |
Critical Values
Not applicable
Turnaround Time
Turnaround times are relative to the time the specimen is received in the test laboratory.
STAT Turnaround Time: Not Available as STAT
Routine Turnaround Time: 4 - 7 Days
Testing Schedule: Test is setup two times per week, typically on Tuesdays & Thursdays
Clinical Indications
Monitor total testosterone serum levels in males and females.
Test Components
Testosterone, Total
Methodology
Liquid Chromatography/Tandem Mass Spectroometry (LC-MS/MS)
CPT Codes
84403
LOINC Codes
2986-8
Synonyms/Keyword Search
N/A
Additional Information
- Results should always be assessed in conjunction with patient's medical history, clinical examination and other findings.
Last Review Date
1/13/2023