{"id":"ige-birch","name":"Birch IgE","shortName":"Birch IgE","aliases":["Birch Tree IgE","T003-IgE Birch","Birch (t3) IgE","t3 IgE","T003-IgE Common Silver Birch","Common Silver Birch IgE","Silver Birch IgE","Allergen, Tree, Birch Tree","IgE, Birch Specific","Betula verrucosa IgE","Birch IgE Ab","ImmunoCAP t3"],"abbreviations":["t3","T003"],"loinc":[{"code":"15283-5","primary":true},{"code":"112146-6","primary":false}],"specimen":"serum","units":[{"ucum":"kU/L","display":"kU/L"}],"referenceRanges":[{"population":"Adults","low":0,"high":0.09,"unit":"kU/L","unitDisplay":"kU/L","note":"Labcorp's sample allergen report prints 'Class 0' as the reference interval, and its class table defines class 0 as under 0.10 kU/L (ARUP also calls under 0.10 'no significant level detected'), so the range is encoded as 0 to 0.09. Other labs set the cutoff higher: ARUP calls 0.10 to 0.34 'clinical relevance undetermined', and UW Medicine lists 0.00 to 0.34 kU/L for all ages and sexes. Children's Minnesota Laboratory reports anything under 0.35 kU/L as negative. Thermo Fisher, which makes the ImmunoCAP system, says results of 0.1 kUA/L or more show sensitization, which is not the same as allergy. Results from different labs or test brands are not directly comparable.","sources":[{"title":"Allergen, Tree, Birch Tree IgE (test 0055058)","url":"https://ltd.aruplab.com/Tests/Pub/0055058","publisher":"ARUP Laboratories"},{"title":"Common Silver Birch (test 602936)","url":"https://www.labcorp.com/tests/602936/common-silver-birch","publisher":"Labcorp"},{"title":"Birch, IgE Result (EBIRC1)","url":"https://dlmp.uw.edu/test-guide/view/EBIRC1","publisher":"University of Washington Medicine Laboratory"},{"title":"Allergen IgE (laboratory test information)","url":"https://www.childrensmn.org/Manuals/Lab/chemistry/allergen-ige.pdf","publisher":"Children's Minnesota Laboratory"},{"title":"Your quick guide to using ImmunoCAP Specific IgE testing","url":"https://corporate.thermofisher.com/content/dam/phadia/library/en/Quick_guide_to_using_ImmunoCAP_Specific_IgE_testing.pdf","publisher":"Thermo Fisher Scientific (Phadia)","year":2024},{"title":"Allergy Testing in Childhood: Using Allergen-Specific IgE Tests (clinical report)","url":"https://doi.org/10.1542/peds.2011-2382","publisher":"American Academy of Pediatrics (Pediatrics)","year":2012},{"title":"Sample report 607120, Allergens with Component Reflexes Area 20 (class description table)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/607120.pdf","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures IgE antibodies to birch tree pollen to show whether your immune system has become sensitized to it, a common cause of spring hay fever.","url":"https://bloodtesttracker.com/markers/ige-birch","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}