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HelpTest Code TSHR Thyroid Stimulating Hormone Ultra (Third Generation) with Reflex
Performing Laboratory
Hunterdon Medical Center Laboratory
Useful For
Screening for diagnosis of thyroid disease. TSH is performed. Free T4 will be reflexed, if indicated.
Facilitates thyroid disease assessment using an algorithm which provides timely results and appropriate test utilization.
Test Includes
TSH with Reflex to Free T4
| Test | Always performed | Criteria for Reflex |
| TSH | Yes | |
| FT4 | No | TSH <0.270 or >4.20 u[IU]/mL |
Specimen Requirements
| Container/Tube | |
| Acceptable | PST (Li Hep) Gel- Mint Green Top |
| Acceptable | SST |
| Specimen Volume | 3.0mL |
| Minimum Volume | 1.0mL |
Specimen Type
Serum / plasma
Specimen Transport Temperature
Ambient
Specimen Stability
| Specimen | Temperature | Time Frame |
| Plasma | Refrigerated 2-8°C | 7 days |
| Serum-gel tube | Refrigerated 2-8°C | 7 days |
Day(s) Test Set up
Sunday through Monday
Reference Values
| Test | Range | Units |
| TSH | 0.27-4.20 | u[IU]/mL |
| FT4 | 0.93-1.70 | ng/mL |
Methodology
ECLIA: Electrochemiluminescence Immunoassay
CPT Code
| CPT Code | Test |
| 84443 | TSH |
| 84439 | Free T4 |
Loinc Code
| LOINC Code | Test |
| 11580-8 | TSH |
| 3024-7 | Free T4 |