Ganglioside GM-1 Antibodies (IgG, IgM), EIA

Test Code

GM1GM

Quest Code

37093

Alias/See Also

37093

CPT Codes
83520 (x2)

Preferred Specimen

1 mL serum

Patient Preparation
Overnight fasting is preferred

Minimum Volume

0.2 mL

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 48 hours
Refrigerated: 14 days
Frozen: 30 days

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

Received room temperature

Methodology
Immunoassay (IA)

Setup Schedule

Night Sets up 2 days a week.

Reference Range

GM-1 Antibody (IgG)	<1:800 titer
GM-1 Antibody (IgM)	<1:800 titer

IgG, IgM Antibodies to Ganglioside GM1

Normal	<1:800
Moderately elevated	1:800-1:3200
Highly elevated	≥1:6400

Clinical Significance

Ganglioside GM-1 Antibody IgG is associated with the Guillain-Barre syndrome, particularly the acute motor axonal neuropathy variant. Antibody IgM is associated with chronic multifocal motor neuropathy.

Performing Laboratory
Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano, CA 92690-6130

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.