Glomerular Basement Membrane Antibody (IgG) [257X]

Test Code
28732

CPT Codes
83520

Preferred Specimen
1 mL serum collected in a red-top tube (no gel)

Minimum Volume
0.3 mL

Other Acceptable Specimens
Serum collected in a serum separator tube (SST)

Transport Container
Plastic screw-cap vial

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

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

Gross hemolysis



Methodology
Immunoassay (IA)

Setup Schedule
Set up: Mon-Sat, a.m; Report available: Next day

Limitations
Weakly positive results (5-30 EU/mL) may occur in patients who do not have antiglomerular basement membrane antibody-mediated disease.

Reference Range
<1.0 AI No antibody detected
≥1.0 AI Antibody detected


Clinical Significance
Glomerular Basement Membrane Antibody is present in one fourth of patients with Goodpasture's syndrome. This syndrome consists of glomerulonephritis and pulmonary hemorrhage.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153




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.