{"id":"iga","name":"Immunoglobulin A (IgA)","shortName":"IgA","aliases":["Immunoglobulin A","IgA","IgA, Total","IgA, Quantitative","IgA Serum","Immunoglobulin A, Qn, Serum","Total IgA","Inmunoglobulina A","Immunglobulin A","Immunoglobulin A (IgA), Serum","IgA, Serum","Serum IgA","IgA Quant","Immunoglobulin A, Quantitative"],"abbreviations":["IgA"],"loinc":[{"code":"2458-8","primary":true}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"g/L","display":"g/L"},{"ucum":"mg/L","display":"mg/L"}],"referenceRanges":[{"population":"18+","low":61,"high":356,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Mayo Clinic Laboratories interval for all adults 18 and older (nephelometry), with no sex split. ARUP prints 68–408 mg/dL for ages 19 and up (immunoturbidimetry) and ABIM lists 90–325 mg/dL. Labs differ, so use the interval on your own report first.","sources":[{"title":"Immunoglobulin A (IgA), Serum (test ID IGA)","url":"https://www.mayocliniclabs.com/test-catalog/overview/8157","publisher":"Mayo Clinic Laboratories"},{"title":"Immunoglobulins (IgA, IgG, IgM), Quantitative (test 0050630)","url":"https://ltd.aruplab.com/Tests/Pub/0050630","publisher":"ARUP Laboratories"},{"title":"ABIM Laboratory Test Reference Ranges, January 2026","url":"https://www.abim.org/Media/bfijryql/laboratory-reference-ranges.pdf","publisher":"American Board of Internal Medicine","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"An antibody that guards the linings of your gut, airways and mouth. It is also the control for celiac blood tests.","url":"https://bloodtesttracker.com/markers/iga","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}