Test Overview
Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

An ancillary test for congenital adrenal hyperplasia, particularly in situations in which a diagnosis of 21-hydroxylase and 11-hydroxylase deficiency have been ruled out and for confirming a diagnosis of 3-b-hydroxydehydrogenase (3-b-HSD) deficiency and 17-alphahydroxylase deficiency.

Reference Range *

Age and sex specific reference ranges provided with report.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Monday, Wednesday, Friday
Analytic Time

3 - 7 days

Soft Order Code
PREGN
MiChart Code
Pregnenolone
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo PREGN (88645)
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and freeze.

    Special Handling

    Strict frozen

    Normal Volume
    1.0 mL serum
    Minimum Volume
    0.5 mL serum
    Storage Temperature
    Strict frozen
    Additional Information

    Test sent to Mayo Clinic Laboratories.

    Billing
    CPT Code
    84140
    Fee Code
    20441
    LOINC
    2837-3
    NY State Approved
    No