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Labcorp Oklahoma, Inc.
Test Directory


Treponema pallidum Ab, Particle Agglutination

Order Name TPPA
Test Number: 5501065
Revision Date 03/20/2019
Test Name Methodology LOINC Code
Treponema pallidum Ab, Particle Agglutination
Particle Agglutination 24312-1 
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.1mL) Serum Clot Activator SST Refrigerated
Instructions Separate serum or plasma from cells ASAP or within 2 hours of collection.
Unacceptable Conditions: CSF or other body fluids.
Stability: After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Testing Schedule Mon-Fri 
Expected TAT 2-5 Days  
Clinical Use The TP-PA test is designed to be used as an aid in the confirmation of antibodies to the treponemal organisms that cause syphilis. Other diseases such as yaws or pinta give positive results. 
Notes Reference Lab: ARUP
Test Code: 50777
Click Here to view information on the ARUP website.
CPT Code(s) 86780
Lab Section Reference Lab