{"id":"ige-pistachio","name":"Pistachio IgE","shortName":"Pistachio IgE","aliases":["F203-IgE Pistachio","f203","Pistachio IgE","F203-IgE Pistachio Nut","Pistachio Nut IgE","Pistachio (f203) IgE","f203 IgE","Allergen, Food, Pistachio IgE","Allergen, Food, Pistachio","Pistachio nut","Pistacia vera IgE","ImmunoCAP f203"],"abbreviations":["f203","F203"],"loinc":[{"code":"7613-3","primary":true},{"code":"112102-9","primary":false}],"specimen":"serum","units":[{"ucum":"kU/L","display":"kU/L"},{"ucum":"U/mL","display":"UA/mL"}],"referenceRanges":[{"population":"Adults","low":0,"high":0.09,"unit":"kU/L","unitDisplay":"kU/L","note":"Class 0, under 0.10 kU/L, is the 'none detected' cutoff: Labcorp prints 'Class 0' (under 0.10 kU/L, negative) as the reference interval for this test, so the range is encoded as 0 to 0.09. Quest and ARUP also print a result under 0.10 kU/L as class 0, and a printed 0.10 is already class 0/1 (Labcorp 'equivocal/low'). ARUP calls 0.10 to 0.34 'clinical relevance undetermined' and says results in that range are for specialist use, and Quest calls it a very low level. Thermo Fisher, which makes the ImmunoCAP system, says results of 0.1 kUA/L or more indicate sensitization. The older 0.35 kU/L cutoff is still used in many studies, including the US NHANES survey. A result above the range shows sensitization, not that you have an allergy (NIAID 2010), and results from different labs or assay systems may not be comparable. Component testing for pistachio is limited: no quantitative pistachio component test is available, and cashew Ana o 3 has been used as a stand-in marker (Thermo Fisher).","sources":[{"title":"F203-IgE Pistachio Nut (test 602486)","url":"https://www.labcorp.com/tests/602486/pistachio-nut","publisher":"Labcorp"},{"title":"Sample patient report: F203-IgE Pistachio Nut (test 602486)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/602486.pdf","publisher":"Labcorp"},{"title":"Allergen, Food, Pistachio (test 0055447)","url":"https://ltd.aruplab.com/Tests/Pub/0055447","publisher":"ARUP Laboratories"},{"title":"ImmunoCAP Specific IgE Blood Test: Allergy Test List (interpretation table and test codes)","url":"https://www.questdiagnostics.com/content/dam/corporate/restricted/documents/hcp/about-our-tests/TL3930_Allergy%20Test%20list%202017.pdf","publisher":"Quest Diagnostics","year":2017},{"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)"},{"title":"Allergen Encyclopedia: f203 Pistachio","url":"https://www.thermofisher.com/phadia/wo/en/resources/allergen-encyclopedia/f203.html","publisher":"Thermo Fisher Scientific (Phadia)"},{"title":"Guidelines for the Diagnosis and Management of Food Allergy in the United States: Report of the NIAID-Sponsored Expert Panel","url":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4241964/","publisher":"NIAID / Journal of Allergy and Clinical Immunology","year":2010},{"title":"IgE allergy diagnostics and other relevant tests in allergy, a World Allergy Organization position paper","url":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7044795/","publisher":"World Allergy Organization Journal","year":2020},{"title":"Low percentage of clinically relevant pistachio nut and mango co-sensitisation in cashew nut sensitised children","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC5357817/","publisher":"Clinical and Translational Allergy","year":2017},{"title":"Defining challenge-proven coexistent nut and sesame seed allergy: A prospective multicenter European study","url":"https://pubmed.ncbi.nlm.nih.gov/31866098/","publisher":"Journal of Allergy and Clinical Immunology","year":2020},{"title":"Pistachio vicilin, Pis v 3, is immunoglobulin E-reactive and cross-reacts with the homologous cashew allergen, Ana o 1","url":"https://pubmed.ncbi.nlm.nih.gov/18479490/","publisher":"Clinical and Experimental Allergy","year":2008},{"title":"Prevalence of allergic sensitization in the United States: results from the National Health and Nutrition Examination Survey (NHANES) 2005-2006","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC4119838/","publisher":"Journal of Allergy and Clinical Immunology","year":2014},{"title":"Allergy Blood Test","url":"https://medlineplus.gov/lab-tests/allergy-blood-test/","publisher":"MedlinePlus (National Library of Medicine)"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Shows whether your immune system has made IgE antibodies to pistachio. This is called sensitization and doesn't always mean a pistachio allergy.","url":"https://bloodtesttracker.com/markers/ige-pistachio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}