Estradiol, Free

Test Code

36169

CPT Codes
82670, 82681

Includes

Estradiol, Free and Estradiol, Ultrasensitive, LC/MS

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

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 24 hours
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Serum separator tube (SST) • Hemolysis • Grossly icteric

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. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Mon, Wed; Report available: 4-10 days

Reference Range

See Laboratory Report

Clinical Significance

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.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.