Syphilis Follow-up Testing (RPR with Titer)
Label Mnemonic: STF
Epic Lab Code: LAB7843
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
Collection Medium:
Red top tube 5 mL (Clot Activator)
Preferred Minimum: 0.5 mL serum
Absolute Minimum: 0.25 mL serum
Rejection Criteria:
CSF and other body fluids.
Turn Around Time:
3-5 days upon receipt at reference laboratory
Reference Range:
Non-reactive (< 1:1)
If RPR is weakly reactive or reactive, then a titer to endpoint will be added.

This test is intended for assessing treatment efficacy in patients who have been treated for syphilis. Successful treatment is generally indicated by a 4-fold reduction in RPR titer (e.g., 1:32 to 1:8).

For routine syphilis testing, "Syphilis IgG" should be ordered.
Semi-Quantitative Charcoal Agglutination
CPT Code:
86592 RPR; if reflexed, add 86593 RPR titer