Triiodothyronine, Free (Free T3) T3F
| Method(s) | LOCI | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Specimen Required | |||||||||
| Collect | One 5 mL gold (SST) top tube. Also acceptable: heparinized plasma. |
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| Transport | 1 mL serum at 2-8ºC (Min: 0.5 mL). |
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| Stability | Refrigerated: 7 days. | ||||||||
| Schedule | Daily, except Sundays | ||||||||
| Billing Code | 1010104 | ||||||||
| CPTCode | 84481 | ||||||||
| Notes | Results of this test may be falsely elevated in patients taking over-the-counter biotin supplements. |
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