{"id":"anti-gbm","name":"Anti-Glomerular Basement Membrane (GBM) Antibody","shortName":"Anti-GBM","aliases":["Anti-GBM Antibody","GBM Antibody","Glomerular Basement Membrane Antibody","Anti-GBM IgG","Goodpasture Antibody","Anti-Glomerular Basement Membrane Ab","Anti-GBM Antibody-IgG","Antiglomerular Basement Membrane Antibody-IgG","Anti-Glomerular Basement Membrane Antibody","Glomerular Basement Membrane Antibody, IgG","Glomerular Basement Membrane Antibody, IgG by Multiplex Bead Assay","GBM Antibody, IgG","GBM Ab, IgG"],"abbreviations":["anti-GBM","GBM Ab"],"loinc":[{"code":"59394-7","primary":true},{"code":"30343-8","primary":false},{"code":"31406-2","primary":false},{"code":"44446-3","primary":false}],"specimen":"serum","units":[{"ucum":"[arb'U]/mL","display":"AU/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":19,"unit":"[arb'U]/mL","unitDisplay":"AU/mL","note":"ARUP multiplex bead assay, reported in AU/mL (arbitrary units). ARUP reads 19 or less as negative, 20 to 25 as equivocal and 26 or more as positive. Units and cutoffs are specific to each kit and are not interchangeable: for example, University of Iowa Hospitals reports an antibody index (negative below 0.4, equivocal 0.4 to 0.9, positive 1.0 or more). Use the cutoff and flag printed on your own report. ARUP's immunofluorescence version is reported as negative or positive rather than as a number.","sources":[{"title":"Glomerular Basement Membrane Antibody, IgG by Multiplex Bead Assay (test 0051000)","url":"https://ltd.aruplab.com/Tests/Pub/0051000","publisher":"ARUP Laboratories"},{"title":"Glomerular Basement Membrane Antibodies, IgG","url":"https://www.healthcare.uiowa.edu/path_handbook/rhandbook/test160.html","publisher":"UI Health Care (University of Iowa Hospitals & Clinics) Laboratory Services Handbook"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Antibodies against a protein in the filters of your kidneys. A positive result is linked to anti-GBM disease, a rare condition that clinicians usually follow up quickly.","url":"https://bloodtesttracker.com/markers/anti-gbm","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}