Myelin Associated Glycoprotein (MAG) Antibody, with Reflex to MAG-SGPG and MAG, EIA : 10063

Test Code

MAGIGM or 10063

Alias/See Also

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): 83520x2) (S3GPC, 10063-2 and MAGAB, 10063-3)

Instructions

Overnight fasting is preferred.

Serum separator tube.

Transport Container

Centrifuge serum separator tube and transport, 2 ml serum (Min: 0.6 mL).

Transport Temperature

Refrigerated.

Specimen Stability

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

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

Avoid Hemolysis

Methodology
Western Blot (WB); if reflex, Enzyme-Linked Immunosorbent Assay

Setup Schedule

Monday & Wednesday

Report Available

6 days (From receipt at performing laboratory)

Limitations

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.

Reference Range

MAG Ab (IgM), WB Negative

If reflex:
MAG-SGPG Ab (IgM), EIA ≤1:1600 titer
MAG Ab (IgM), EIA <1:1600 titer

Interpretation:
MAG Antibody (IgM), EIA
Normal <1:1600
Moderately elevated 1:1600-1:3200
Highly elevated ≥1:6400

Clinical Significance

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

Performing Laboratory
Quest Diagnostics

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.