Rheumatoid Factor, CSF

Test Code

17407

CPT Codes
86431

Preferred Specimen

1.5 mL CSF in sterile transport tube

Minimum Volume

1 mL

Instructions

Freeze immediately, and ship frozen.

Transport Temperature

Frozen

Specimen Stability

Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 28 days

Methodology
Immunoturbidimetry

Setup Schedule

Set up: Daily; Report available: Next day

Reference Range

≤7 IU/mL

Clinical Significance

Central nervous system vasculitis is a rarely described complication of rheumatoid arthritis. As with rheumatoid vasculitis in general, the cause of CNS vasculitis in rheumaroid arthritis (RA) is unknown.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.