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Test Directory

Test Directory Estradiol, Free

Estradiol, Free

Test Summary

Much of Estradiol is bound to proteins. The unbound portion and Estradiol bound to proteins with low affinity reflect the free concentration. The Free Estradiol may better correlate with medical conditions than the Total Estradiol concentrations.

Aliases

Specimen Collection

Special Instructions

N/A

Preferred Specimen

1 mL serum collected in a red-top tube (no gel)

Minimum Volume

0.5 mL

Instructions

Specify age and sex on test request form

Patient Preparation

N/A

Storage

N/A

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature = 24 hours
Refrigerated = 7 days
Frozen = 28 days

Limitations

N/A

Other Acceptable Specimens

N/A

Unacceptable Specimens

Serum separator tube; hemolysis; lipemia; grossly icteric

Order Code

ESTDLF

EPIC (Premier) Code

LAB3841

Includes

Estradiol, Free and Estradiol, Ultrasensitive, LC/MS

CPT Code

82670
82681

Billing Code

670279

CPT Statement

Methodology

Chromatography/Mass Spectrometry • Equilibrium Dialysis

FDA Status

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Physician Attestation of Informed Consent

N/A

Testing Laboratory

Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675

Department

Reference Testing

Reference Range

See Laboratory Report

Setup Schedule / Expected Turnaround Time

Monday, Wednesday; Report available: 4 - 10 days