T4 (Thyroxine), Total Only
Order Name
T4
Revision Date 12/16/2019
Revision Date 12/16/2019
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
T4 (Thyroxine), Total Only
|
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1.0 mL (0.5 mL) | Serum | Serum Gel Tube | Refrigerated |
| Alternate 1 | 1.0 mL (0.5 mL) | Serum | Red Top | Refrigerated |
| Instructions | Patient Preparation: For 12 hours before this test do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins. Label specimen with Mobilab label or with patient name (first and last), date of birth, date and time of collection, collector initials, and test(s) being ordered. |
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| Reference Range | An interpretive report will be provided. | |||
| Methodology | Electrochemiluminescence Immunoassay | |||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Monday through Friday 5 a.m. - 12 a.m.; Saturday 6 a.m. - 6 p.m. |
| Expected TAT | 1-3 Days |
| Notes | Specimen Stability: Refrigerated (preferred)- 7 Days Frozen - 30 Days |
| CPT Code(s) | 84436 |
| Lab Section | NRLS-Mayo Medical Laboratories |