Testosterone, Free, Mass Spectrometry/Equilibrium Dialysis *

SIM

LAB3220

CPT

84402; 84403 

Synonyms

Testosterone, Free Gradient Diffusion; Free Testosterone ED 

Specimen Type

Serum, frozen

Container

Gold-top or red-top tube

Collection Instructions

Volume

Volume:2 mL 
Minimum volume:1mL 

Additional Information

This method is recommended for testing women, children and hypogonadal  men. 
This  free testosterone is ordered only if specifically requested for this methodology, otherwise, order Testosterone, Free

Patient Preparation

Specimen Processing Instructions

Serum must be separated from cells within 45 minutes of collection. Send serum in a plastic transport tube.

Transport Requirements

Frozen

Specimen Stability

Frozen: 2.6 years

Rejection Criteria

EDTA plasma; Citrated plasma; Heparinized plasma; hemolysis>5% 

Reference Range

Reference Range accompanies report

Critical Value

Test Includes

Free Testosterone and Total Testosterone 

Methodology

Testosterone: High pressure liquid chromatography(HPLC)/tandem mass spectrometry

Free testosterone: equilibrium dialysis 

Testing Frequency

 Lab Corp sends to Endocrine Sciences

LCA

500726 

Reviewed By

Rhonda Crowe

Reviewed Date

3/1/23

Supplemental

* Denotes Reference lab test