Test Overview
Test Methodology

Fluorescence Enzyme Immunoassay (FEIA)

Test Usage

Evaluating patients suspected to have a condition associated with eosinophilia or hypereosinophilia. Evaluating patients with elevated peripheral blood eosinophil counts. Managing patients with elevated eosinophil-derived neurotoxin in the context of eosinophil-associated diseases

Reference Range *

<70 mcg/L: Normal
70-99 mcg/L: Borderline
> or =100 mcg/L: Elevated

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

Test Details
Days Set Up
Tuesday
Analytic Time

3 - 9 days

Soft Order Code
EDN
Synonyms
    Laboratory
    Sendout
    Reference Laboratory
    Mayo EDN
    Section
    Special Testing
    Specimen Requirements
    Collection Instructions

    Collect specimen in an SST or red top tube. Spin and aliquot into a screw capped plastic tube within 12 hours of collection. Send to Specimen Processing refrigerated.

    Special Handling

    Serum cannot sit on either gel or cells for longer than 12 hours.

    Normal Volume
    0.5 mL serum
    Minimum Volume
    0.3 mL serum
    Storage Temperature
    Refrigerated preferred; frozen acceptable
    Additional Information

    Test performed by Mayo Clinic Laboratories

    Billing
    CPT Code
    83520
    Fee Code
    AB086
    NY State Approved
    No