Days Set Up
Tuesday, Friday
Analytic Time

8 hours

MiChart Code
Fluorescent Treponemal AB (non-UMHS)
Soft Order Code

Test Updated:


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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

Indirect Fluorescent Antibody (IFA), Treponema pallidum substrate

Test Usage

To confirm presence of Treponema pallidum antibodies in the diagnosis of syphilis.

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 SST tube.

Collection Offsite

Collect specimen in SST tube. Centrifuge; aliquot 1.5 mL of serum into 3 plastic vials (0.5 mL each), and refrigerate. Either Treponemal antibody FTA-ABS and RPR (FTA) or Treponemal antibody FTA-ABS only (FTA A) may be ordered. If FTA only is requested, results of non-syphilis serology (VDRL or RPR) must be indicated on requisition; 2 serum aliquots of 0.5 mL each are required for FTA only.

Yellow Top Tube
Normal Volume
1.5 mL serum
Minimum Volume
1.0 mL serum

Billing Information

CPT Code
86780 FTA, 86592 RPR
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.