Rheumatoid Factor

Message

LOINC: 11572-5

Test Code

LAB206

Alias/See Also

RA, RFA, RH Factor, Rheumatoid factor, Rheumatoid Arthritis Screen

CPT Codes
86431

Preferred Specimen

Light Green top Plasma

Minimum Volume

1 mL

Other Acceptable Specimens

Red/Gold top Serum

Instructions

Routine venipuncture Collect one 4.5ml light green top (lithium heparin) tube or one 5ml Red/gold top serum separator tube"

Specimen Stability

Refrigerate, stable 48 hours; stable 8 hours at room temperature; stable >48 hours if frozen.

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

Failure to follow collection and handling procedures

Methodology
Two point rate: The aggl'n is detected at the absorbance change with the magnitude of change being proportional to the quantity of RF in sample.

Setup Schedule

Daily

Report Available

Daily

Reference Range

<12 IU/mL

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.