Testosterone
Test Mnemonic
TESTO
CPT Codes
- 84403 - QTY (1)
LOINC ®
2986-8
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Lithium heparin PST (Lt. Green) | Centrifuge and refrigerate. | Submit in original tube or aliquot specimen into CCL aliquot tube |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Centrifuge and refrigerate. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.4 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 5 days |
| Refrigerated | 14 days |
| Frozen | 6 months |
Days Performed
Sun - Sat
Turnaround Time
8 hours
Methodology
| Name | Description |
|---|---|
| Electro Chemiluminescence Immunoassay (ECLIA) |
Reference Range
| Testosterone | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Male | Days | 364 Days | Normal | < 12 | ng/dL | Male | 1 Years | 5 Years | Normal | < 12 | ng/dL | Male | 6 Years | 10 Years | Normal | < 25 | ng/dL | Male | 11 Years | 15 Years | Normal | < 830 | ng/dL | Male | 16 Years | 17 Years | Normal | 102-1010 | ng/dL | Male | 18 Years | 99 Years | Normal | 193 - 824 | ng/dL | Female | Days | 364 Days | Normal | < 21 | ng/dL | Female | 1 Years | 5 Years | Normal | < 12 | ng/dL | Female | 6 Years | 10 Years | Normal | < 25 | ng/dL | Female | 11 Years | 17 Years | Normal | < 79 | ng/dL | Female | 18 Years | 99 Years | Normal | < 40 | ng/dL |
Clinical Info
Adult Males: A testosterone level in the 193-320 ng/dL range with associated clinical symptoms is considered low and may indicate hypogonadism (from NEJM 2010 363:123-135). Results > 320 ng/dL are considered normal. Pediatric Patients: Reference ranges were not locally established for pediatric patients. The normal values are based on the following source: Kulasingam V, Jung BP, Blasutig IM, et al. Pediatric reference intervals for 28 chemistries and immunoassays on the Roche cobas® 6000 analyzer—A CALIPER pilot study. Clinical Biochemistry. 2010;43:1045-1050.