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Test Code
MAGAB
Test Name
Myelin-Associated Glycoprotein (MAG) Ab (IgM), EIA
CPT Codes
83520
Expected Turnaround Time
4 - 8 days
Clinical Utility

A positive test result for MAG antibody is consistent with sensory or sensorimotor neuropathy and monoclonal gammopathy of uncertain significance.
Specimen and Container Info

Specimen Type: Serum

Preferred Collection Container: Red Top, Plain

Alternate Collection Container: Gold Top, Serum Separator

Desired Specimen Volume: 1 mL
Collection Instructions
  1. Collect a red top, plain tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 1 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated.
Stability Requirements

Room Temperature

48 hours

Refrigerated

7 days

Frozen

30 days
Causes for Rejection
  • Received room temperature
Methodology
Enzyme Immunoassay
Reference Intervals

See patient report.
Alternate Names
  • MAG Antibody
Reference Lab
Quest Diagnostics Nichols Institute
Testing Schedule
Routine, 2 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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