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T4 Thyroxine Total Only, Serum

Centralized Core Laboratory - Mayo Clinic Laboratories : Send Out

Test ID :
Test Workstation :
Specimen Type:
Tube Type:
Gold Top SST (Serum Separator Tube)
Collection Volume:
2.5 mL
Minimum Volume:
1.9 mL
Cause for Rejection:
Grossly hemolyzed
Sent to Reference Lab performed Monday through Friday
Electrochemiluminescence Immunoassay
Special Instructions:
This test cannot be used in patients receiving treatment with lipidlowering agents containing dextrothyroxine unless therapy is discontinued for 4 to 6 weeks to allow the physiological state to become reestablished prior to testing.
1-3 days
Additional Info:
Reference Range: See reference lab ranges on report
CPT Code:
SynThyroid T4, Serum Tetraiodothyronine Thyroid Hormone Thyroxine, Total T4 Total Only, S Thyroxine Thyroxine

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