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Rheumatoid Factor Screen with Reflex to Titer, Synovial Fluid
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
RFSYN
CPT Codes
86430<br /> **This test is not available for New York patient testing**
Includes
If RF Screen is positive, RF Titer will be performed at an additional charge (CPT code(s): 86431)
Preferred Specimen
1 mL synovial fluid submitted in a sterile, screw-cap vial
Minimum Volume
0.3 mL
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 21 days
Refrigerated: 7 days
Frozen: 21 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Visible particulate matter • Lipemia
Methodology
Latex Agglutination (LA)
Setup Schedule
Setup: Tues, Fri; Report available: 3 days
Reference Range
Rheumatoid Factor, LA Screen | Negative |
Rheumatoid Factor, LA Titer | <1:5 |
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |
Last Updated: December 6, 2021