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Test Code
ESTDF
Test Name
Estradiol, Free
Expected Turnaround Time
2 - 10 days
Clinical Utility
Use to directly measure free estradiol. May be used to evaluate estradiol status for individuals with protein-binding abnormalities or individuals on hormonal contraception.
Specimen and Container Info

Preferred Specimen Type: Serum

Preferred Collection Container: Gold Top, Serum Separator

Alternate Collection Container: Red Top, Plain

Desired Specimen Volume: 2 mL
Collection Instructions
  1. Collect specimen in gold top, serum separator tube or red top, plain tube via venipuncture
  2. Centrifuge and transfer serum to plastic aliquot tube
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Refrigerated

1 week

Frozen

6 months
Methodology
Quantitative Equilibrium Dialysis/High Performance Liquid Chromatography-Tandem Mass Spectrometry
Reference Intervals

See patient report.
Reference Lab
ARUP Laboratories
Testing Schedule
Routine, 1 time per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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