Days Set Up
Monday - Friday, 8:00am - 4:30pm
Analytic Time

5 days

Soft Order Code

Test Updated:


HLA Antibody Screening
HLA Typing Class I and II
Percent Reactive Antibody (PRA)
New Patient, Solid Organ Tx
HLA Antibody Specificity Class II
HLA Class II Low Resolution
HLA Class I Low Resolution
HLA Antibody Specificity Class I

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Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

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Order Kits and Supplies

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

Test FAQ

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Test Overview

Test Methodology

Molecular Typing (SSO) and Solid Phase Assay

Test Usage

At the UMHS Histocompatibility Laboratory potential recipients are typed for HLA-A, B, C, DRB1,3,4,5, DQB1, DQA1 loci by medium/low resolution SSO molecular methods. Each recipient is screened to detect preformed anti-HLA antibodies. Patients may develop these antibodies in case of previous sensitization events like transfusion, pregnancies or previous transplant. When these antibodies are detected the Panel Reactive Antibody (PRA%) value is assigned and the anti-HLA antibody specificity is defined by Solid Phase Single Antigen assays. PRA% values are updated with a new sample every 3 months. For patients listed for transplant with a deceased donor the Histocompatibility Laboratory will updated PRA% and the Unacceptable Antigens list in the UNOS database every 3 months. Every month a fresh serum sample is mailed to the Organ Procurement Organization (OPO). This serum sample and the historic higher PRA% sample (peak) will be used for Flow Cytometric Crossmatch with matched deceased donors.

Reference Range

Interpretive report provided.

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

Specimen Requirements

Yellow Top Tube
Normal Volume
20 mL ACD (solution A) whole blood AND 5 mL serum
Minimum Volume
10 mL ACD (solution A) whole blood AND 2 mL serum

Billing Information

CPT Code
81372, 81376, 86832, 86833
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.