T3, Free
| Alternate Names | FT3; Free Triiodothyronine |
| Ordering Recommendation | Measurements of free triiodothyronine, along with thyroid-stimulating hormone measurement (TSH) and free thyroxine (FT4), are used in the diagnosis and management of thyroid disease. |
| Specimen | Lithium Heparin Plasma |
| Container Type | Green Top Tube
|
| Methodology | Chemiluminescence |
| Reference Range | 1-23 months: 3.3-5.2 pg/mL 2-12 years: 3.3-4.8 pg/mL 13-20 years: 3.0-4.7 pg/mL >20 years: 2.3-4.2 pg/mL |
| Stability | 7 days |
| Transport Temp | Refrigerate 2°-8°C |
| Days Performed | Daily |
| Report Available | 1 day |
| NY State Available | Yes |
| LOINC Code | 3051-0 |
| CPT Code | 84481 |
