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

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

MAGABR

Alias/See Also

10063

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

0.6 mL

Instructions

Avoid hemolysis

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

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

Methodology
Western Blot (WB)

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

Set up: Mon, Wed, Report available: 6 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
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 Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

Last Updated: October 5, 2022

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.