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Register NowThyroid-stimulating Hormone (TSH) With Reflex on abnormal to Free T4*
Create a Free Account to View PricesCPT Code: 84443
Test Type: 2 mL Serum
Stability Time:
| Temperature | Period |
|---|---|
| Freeze | 14 days |
| Room | 14 days |
| Refrigerator | 14 days |
| Freeze/thaw cycles | Stable x3 |
Overview:
Collection Details:
Collection Instructions:
Note: If TSH is HIGH or LOW , will reflex to T4 Free Direct, at an additional charge. ****Enter 349829,R for cascade reflex**** description. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high doseof biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.
Gel-barrier tube is preferred. Red top tube is acceptable.
If red top tube is used, transfer separated serum to a plastic transport tube.
Room temperature.