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HelpTest Code SYPS Syphilis Screen
Additional Codes
| Epic Ordering Code | LAB3040198 |
| NBS code | LBC00952 |
| Service code | 31858 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: |
| Yellow Top | Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 3 days |
| Refrigerate | 7 days (preferred) |
| Frozen | 1 year |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
Monday through Friday, TAT 1 - 5 days
TPPA and RPR: Tuesday and Friday, TAT 1 - 5 days
Reference Interval
Non-reactive
Confirmatory / Reflex information:
| Test name | Reference Interval | Critical Value |
|---|---|---|
| Treponema pallidum Passive Particle Agglutination | Non-reactive | Not applicable |
| Rapid Plasma Reagin | < 1:2 | > 1:2 (NUH Antenatal Screen only) |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Screening test for current or previous syphilis infection
Update
Last updated 26/07/2026
LOINC Code Information
24110-9
Confirmatory / Reflex tests:
| Treponema Pallidum Particle Agglutination (TPPA) | 24312-1 |
|---|---|
| Rapid Plasma Reagin Value | 31147-2 |
| Rapid Plasma Reagin | 20507-0 |
Alias
Syphilis Antibody
Syphilis Serology
Reflex Testing
Samples reactive for Syphilis Ab are confirmed by supplemental test Treponema pallidum Passive Particle Agglutination (TPPA) Assay.
Samples reactive for TPPA are tested by a supplemental test Rapid Plasma Reagin (RPR) to confirm an acute syphilis (For NUH and AH only).