Ri Antibody Screen with Reflex to Titer and Western Blot

Test Code

CPT Codes

If Ri Antibody Screen, IFA is positive, then Ri Antibody, WB will be performed at an additional charge (CPT code(s): 84181).
If Ri Antibody, WB is positive, then Ri Antibody, Titer will be performed at an additional charge (CPT code(s): 86256).

Preferred Specimen
1 mL serum

Patient Preparation
Overnight fasting is preferred

Minimum Volume
0.3 mL

Transport Container
Plastic screw-cap vial

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 21 days

Immunofluorescence Assay (IFA) • Western Blot (WB)

FDA Status
This test was developed and its performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. Performance characteristics refer to the analytical performance of the test.

Setup Schedule
Set up: Mon, Wed, Fri a.m; Report available: 6 days

Reference Range
Ri Ab Screen, IFANegative
  Ri Ab, WBNegative
  Ri Ab, Titer<1:40

Clinical Significance
Anti-Ri can be detected in patients with the paraneoplastic opsoclonus/myoclonus syndrome. Neoplasms most often associated with Anti-Ri include breast cancer, gynecological cancers, and small cell lung cancer.

Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042

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.