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HelpTest Code TESTL Testosterone,LAB124
Performing Laboratory
St. Luke's Hospital Laboratory
Specimen Requirements
Preferred Container/Tube: Gold-top serum tube or red-top serum tube
Acceptable: EDTA lavender-top and lithium or sodium heparin green-top
Specimen Volume: 0.5 mL of serum or plasma
Minium: 0.25 mL of serum or plasma
Stability and Storage:
- Room temperature: 48 hours
- Refrigeration (2°- 8°C): 7 days
- Frozen (≤ -20°C): Undetermined. Freeze samples only once and mix thoroughly after thawing.
Transport: Refrigerated
Note: This assay is affected by biotin interference.
Reference Values
| Male (age) | Reference Range (ng/dL) |
|---|---|
| 2-10 | <7 - 29 |
| 11 | <7 - 353 |
| 12 | <7 - 562 |
| 13 | 8 - 583 |
| 14 | 20 - 777 |
| 15 | 127 - 849 |
| 16-20 | 113 - 882 |
| 21-49 | 123 - 814 |
| ≥50 | 87 - 780 |
| Females (age) | Reference Range (ng/dL) |
|---|---|
| 2-10 | <7 - 118 |
| 11-15 | <7 - 39 |
| 16-20 | 15 - 42 |
| 21-59 (Premenopausal) | 9 - 48 |
| >60 (Postmenopausal) | <7 - 46 |
Note: Postmenopausal reference range may be applicable for ages 45-89, correlation with entire patient clinical picture is recommended for appropriate reference range.
Pediatric Tanner Stage
| Males | Reference Range (ng/dL) | Females | Reference Range (ng/dL) |
|---|---|---|---|
| Stage 1 | <7 - 47 | Stage 1 | <7 - 90 |
| Stage 2 | <7 - 174 | Stage 2 | <7 - 38 |
| Stage 3 | 10 - 803 | Stage 3 | <7 - 34 |
| Stage 4 | 64 - 736 | Stage 4 | <7 - 39 |
| Stage 5 | 56 - 897 | Stage 5 | 11 - 50 |
Day(s) Test Set Up
Tuesday and Friday
STAT testing available Monday through Friday, day shift only
Test Classification and CPT Coding
84403
Useful For
Clinical evaluation of serum testosterone, along with serum LH, assists in evaluation of hypogonadal males. Major causes of lowered testosterone in males include hypogonadotropic hypogonadism, testicular failure, hyperprolactinemia, hypopituitarism, some types of liver and kidney diseases, and critical illness.
Methodology
Chemiluminescence Assay
Analytic Time
2-4 days upon receipt