CPT Code: 84403
Order Code: 15983
ABN Requirement: No
Specimen:
Preferred: Serum
Alternative: Plasma
Volume: 1.0 mL
Minimum Volume: 0.5 mL
Container: Red Top (no gel barrier) tube or gel barrier tube (SST)
Collection:
Specify age and sex on test request form.
Red-top tube (no gel): Allow blood to clot at room temperature. Centrifuge to separate the serum from the cells and immediately pour serum into a plastic transport tube.
Serum separator tube: Allow blood to clot at room temperature, centrifuge, and remove serum from the gel immediately (not to exceed 48 hours) by pouring serum into a plastic transport tube.
Transport: Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions included with the provided shipping box.
Stability:
Ambient (15-25°C): 7 days
Refrigerated (2-8°C): 21 days
Frozen (-20°C): 2 years
Causes for Rejection: Gross hemolysis; Grossly lipemic
Methodology: Chromatography/Mass Spectrometry
Turn Around Time: 3 to 5 days
Reference Range:
| Age | Males (ng/dL) | Females (ng/dL) |
|---|---|---|
| Cord Blood* | 17-61 | 16-44 |
| 1-10 Days* | ≤187 | ≤24 |
| 11-30 Days | Not Established | Not Established |
| 1-2 Months* | 72-344 | ≤17 |
| 3-4 Months* | ≤201 | ≤12 |
| 5-6 Months* | ≤59 | ≤13 |
| 7-11 Months* | ≤16 | ≤11 |
| 1-5 Years | ≤5 | ≤8 |
| 6-7 Years | ≤25 | ≤20 |
| 8-10 Years | ≤42 | ≤35 |
| 11 Years | ≤260 | ≤40 |
| 12-13 Years | ≤420 | ≤40 |
| 14-17.9 Years | ≤1000 | ≤40 |
| ≥18 Years | 250-1100 | 2-45 |
*Data from J Clin Invest 1974;53:819-828 and J Clin Endocrinol Metab 1973;36:1132-1142
Clinical Significance: Helpful in assessing testicular function in males and managing hirsutism, virilization in females.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.