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Thyroxine Free Direct Dialysis Blood Test (T4)

Total reviews 408

$87.00 $58.00

Total reviews 408


  • Tests Included: 1

  • Est. 8-10 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

For the differential diagnosis of euthyroid hyperthyroxinemia from hyperthyroidism or for the differential diagnosis of euthyroid hypothyroxinemia from hypothyroidism.

$87.00 $58.00
  • Tests Included: 1

  • Est. 8-10 (business days) Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

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T4 Free, Direct Dialysis

  • Test Code: 35167
  • CPT Code: 84439
  • Alternate Name: Free T4 By Equilibrium Dialysis,Thyroxine, Free By Direct Dialysis,Direct Free T4,Free T4 Direct Dialysis,FT4 Direct Dialysis,Free Thyroxine
  • Test Instructions : Fasting preferred

    Please do not exercise prior to testing. It is best that your blood is taken in a rested state.

  • Fasting: Yes
  • Methodology: Equilibrium Dialysis • Chromatography/Mass Spectrometry
  • Results In: 8-10

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

Adult 0.9-2.2 ng/dL
Prematures, 25-30 Weeks  
  Birth-7 Days 0.5-3.3 ng/dL
Prematures, 31-36 Weeks
  Birth-7 Days 1.3-4.7 ng/dL
Cord Blood, >37 Weeks 1.2-2.2 ng/dL
Birth-4 Days 2.2-5.3 ng/dL
2 Months-2 Years 1.2-2.5 ng/dL
3 Years-17 Years 1.0-2.4 ng/dL
Pregnancy  
  First Trimester 0.9-2.0 ng/dL
  Second Trimester 0.8-1.5 ng/dL
  Third Trimester 0.8-1.7 ng/dL

 

$87.00 $58.00

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