Miscellaneous Rheumatoid Factor

Test Code

MISRA

CPT Codes
86431

Preferred Specimen

Body fluid specimen, including but not limited to: Cerebrospinal Fluid, pleural fluid, pericardial fluid, peritoneal fluid, or synovial fluid. Note fluid type in order comments or on patient specimen label.

Minimum Volume

1 mL

Instructions

Collect body fluid in a body fluid collection bag or other sterile container and transport to lab. Refrigerate if transport will be delayed. Note fluid type in order comments or on patient specimen label.

This test is for Rheumatoid Factor measurement on Body Fluids. For Rheumatoid Factor measurement on Plasma or Serum, order RA.

Transport Container

Body fluid collection bag or sterile container

Transport Temperature

Room Temperature or Refrigeration

Specimen Stability

Room Temperature - 4 hours; Refrigerated - 24 hours

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross viscosity or turbidity

Methodology
Photometric

Setup Schedule

Daily upon receipt

Report Available

Upon completion of analysis

Clinical Significance

Rheumatoid factor is essentially an IgM antibody that is directed toward IgG. Although it is a non-specific marker, it is associated with autoimmunity and rheumatoid arthritis.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.