{"id":"beta-2-glycoprotein-1-igg","name":"Beta-2 Glycoprotein I Antibody IgG","shortName":"Anti-β2GPI IgG","aliases":["B2GP1 IgG","Beta-2 Glycoprotein 1 IgG","Beta 2 GPI IgG","Anti-β2GPI IgG","B2 Glycoprotein I Ab IgG","Beta-2 Glycoprotein I IgG","Anti-beta2GP1 IgG","Beta-2 Glycoprotein 1 Antibody IgG","Beta-2 Glycoprotein 1 Antibodies, IgG, Serum","Beta 2 GP1 Ab IgG, S","β2-Glycoprotein 1 Antibodies, IgG","Beta-2 Glycoprotein I Ab, IgG","Beta-2-Glycoprotein I Antibody (IgG)","Anti-beta-2 glycoprotein I IgG","aβ2GPI IgG","B2GPI IgG","Anti-β2 Glycoprotein I Antibody IgG"],"abbreviations":["aβ2GPI IgG","B2GPI IgG","B2GP1 IgG"],"loinc":[{"code":"44448-9","primary":true},{"code":"16135-6","primary":false},{"code":"43914-1","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"[arb'U]/mL","display":"U/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":15,"unit":"[arb'U]/mL","unitDisplay":"U/mL","note":"Mayo Clinic Laboratories (ELISA, reported in SGU): negative below 15.0 (15.0 itself is weakly positive), applies to all ages. Labs differ: Labcorp reports 0.0-16.2 EliA U/mL and ARUP reports 20 or less SGU. Cutoffs are specific to each assay, so use the range printed on your own report.","sources":[{"title":"Beta-2 Glycoprotein 1 Antibodies, IgG, Serum (test GB2GP)","url":"https://www.mayocliniclabs.com/test-catalog/overview/86182/beta-2-glycoprotein-1-antibodies-igg-serum","publisher":"Mayo Clinic Laboratories"}]},{"population":"Adults","low":0,"high":16.2,"unit":"[arb'U]/mL","unitDisplay":"U/mL","note":"Labcorp (Thermo Fisher EliA fluorescence enzyme immunoassay): 0.0-16.2 EliA U/mL. Cutoffs are specific to each assay, so use the range printed on your own report.","sources":[{"title":"β2-Glycoprotein 1 Antibodies, IgG (test 163882)","url":"https://www.labcorp.com/tests/163882/b2-glycoprotein-1-antibodies-igg","publisher":"Labcorp"}]},{"population":"Adults","low":0,"high":20,"unit":"[arb'U]/mL","unitDisplay":"U/mL","note":"ARUP Laboratories (semi-quantitative ELISA, reported in SGU): 20 or less SGU. Cutoffs are specific to each assay, so use the range printed on your own report.","sources":[{"title":"Beta-2 Glycoprotein 1 Antibodies, IgG and IgM (test 0050321)","url":"https://ltd.aruplab.com/Tests/Pub/0050321","publisher":"ARUP Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures IgG antibodies against beta-2 glycoprotein I, a blood protein. It is one of the tests used when a clinician is looking into antiphospholipid syndrome (APS).","url":"https://bloodtesttracker.com/markers/beta-2-glycoprotein-1-igg","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}