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Test Directory

4227 T4 (Thyroxine), total

Specimen Type
Specimen Stability
Reference Range
Serum
7 Days 2 - 8° C
4.5-12.6 ug/dL

Specimen Requirements

Specimen Type: Serum
Container: 1 Serum Separator Tube (SST)
Temperature: Refrigerated
Preferred Vol: 1.00 mL
Min Vol: 0.50 mL

Method

Immunochemiluminometric

Schedule

Mon-Sat

Turn-Around Time

24hrs; Also offered STAT at an additional charge

Instructions/Notes

Clinical Utility

To help evaluate thyroid gland function; to help diagnose hypothyroidism or hyperthyroidism; to screen for hypothyroidism in newborns.

CPT Codes

84436

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