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.