Myelin Associated Glycoprotein (MAG) Antibody, with Reflex to MAG-SGPG and MAG, EIA

Message

Overnight fasting is preferred.
If MAG Antibody (IgM), WB is positive, MAG-SGPG Antibody (IgM), EIA and MAG Antibody (IgM), EIA, will be performed at an additional charge (CPT code(s): 83520 x2)

Test Code

MAGAR

Alias/See Also

LAB12865,MAG Antibody

CPT Codes
84181

Includes

If MAG Antibody (IgM), WB is positive, then MAG-SGPG Antibody (IgM), EIA and MAG Antibody (IgM), EIA, will be performed at an additional charge (CPT code(s): 83520 x2)

Preferred Specimen

2 mL serum

Patient Preparation
Overnight fasting is preferred

Minimum Volume

1 mL

Instructions

Avoid hemolysis

Transport Temperature

Refrigerated

Specimen Stability

Room temperature: 24 hours Refrigerated: 7 days Frozen: 30 days

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

Hemolyzed, lipemic, bacterially contaminted.

Methodology

Western Blot (WB)

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.

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Mon, Sat a.m.

Report Available

11 Days

Reference Range

MAG Ab (IgM), WB Negative
MAG-SGPG Ab (IgM), EIA ≤1:1600 titer
MAG Ab (IgM), EIA <1:1600 titer
MAG Antibody (IgM), EIA

Clinical Significance

MAG, Western Blot with reflexes is useful in detecting antibodies associated with autoimmune peripheral neuropathy.

Performing Laboratory
Quest Diagnostics Nichols Inst San Juan Capistrano 33608 Ortega Highway San Juan Capistrano, CA 92675

Last Updated: February 1, 2012

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.