Days Set Up
Monday - Friday
Analytic Time

5 - 7 days

Soft Order Code

Test Updated:


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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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MLabs provides all the supplies necessary for the collection of specimens.

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Test Overview

Test Methodology

Flow Cytometry

Test Usage

Mutations of the FoxP3 gene have been described in patients with immune dysregulation, polyendocrinopathy, enteropathy, X-linked syndrome (IPEX). This assay uses flow cytometry to determine the proportion and intensity of intracellular FoxP3 protein expression in the subset of CD4+ T cells that are CD25 bright and CD127 negative. The PCH101 antibody reacts with the amino terminus of human foxp3 protein.

Reference Range

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

Specimen Requirements

Collection Onsite

Collect specimen in lav top tube and send to Specimen Processing at room temperature. Results of current CBC must be sent with specimen.Draw Monday- Thurs only

Collection Offsite

Collect specimen in lavendar top tube and send intact whold blood specimen at room temperature. Include a copy of the patient's concurrently drawn CBC and Differential result. Draw Monday-Thursday only

Lavender Top Tube
Normal Volume
3 mL EDTA whole blood
Minimum Volume
1 mL EDTA whole blood

Billing Information

CPT Code
88184, 88185 x3
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.