Days Set Up
Monday - Friday
Analytic Time

8 hours

Soft Order Code

Test Updated:


Rapid Plasma Reagin
Rapid Plasma Reagin, Serum
RPR, Serum
Serologic Test for Syphilis
Syphilis Antibody Screen
Syphilis Screening Test
Treponema pallidum Antibody Screen, Serum
VDRL Equivalent, Serum
Rapid Plasma Reagin
Serologic Test for Syphilis
Syphilis Screening Test
VDRL Equivalent, Serum

Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

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

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

Nontreponemal flocculation procedure (RPR).

Test Usage

Screening test for syphilis.

Reference Range


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

Specimen Requirements

Collection Offsite

Collect specimen in SST tube. Centrifuge, aliquot serum into plastic vial and refrigerate.
Contaminated, lipemic or grossly hemolyzed sera should not be used because of the possibility of nonspecific reactions.

Yellow Top Tube
Normal Volume
0.5 ml serum
Minimum Volume
0.5 ml serum

Billing Information

CPT Code
Pro Fee Code
20507-0 (RPR), 31147-2 (RPRQN)

Have More Questions?

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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.