{"id":"lymphocytes-percent","name":"Lymphocytes (Percent)","shortName":"Lymphocytes %","aliases":["LYMPHOCYTES","Lymphocytes %","Lymph %","Lymph%","Lymphocyte Percent","Lymphs %","Linfocitos %","Lymphozyten %","Lymphocytes, Percent","Lymphocyte %","Lymphocytes (%)","LYM%","Lymphs (%)","Percent Lymphocytes","Lymphs"],"abbreviations":["LYM%","Lymph%"],"loinc":[{"code":"736-9","primary":true},{"code":"26478-8","primary":false},{"code":"737-7","primary":false},{"code":"71678-7","primary":false}],"specimen":"whole-blood","units":[{"ucum":"%","display":"%"},{"ucum":"1","display":"fraction"}],"referenceRanges":[{"population":"18+","low":17.6,"high":49.6,"unit":"%","unitDisplay":"%","note":"ARUP's interval for adults 18 and older, the only published adult percent interval opened for this entry. StatPearls says lymphocytes make up around 20-40% of white cells. Labcorp prints no reference interval for lymphocyte percent ('Not Estab.'), and CAP guidance strongly recommends that labs not report percent ranges when absolute counts are reported with ranges, so many reports show none.","sources":[{"title":"CBC with Platelet Count and Automated Differential (test 0040003), Hotline effective March 1, 2021","url":"https://ltd.aruplab.com/api/ltd/hotline/0040003/44232","publisher":"ARUP Laboratories","year":2021},{"title":"Lymphocytosis","url":"https://www.ncbi.nlm.nih.gov/books/NBK549819/","publisher":"StatPearls (NCBI Bookshelf)"},{"title":"Q&A: reporting percent and absolute differential reference ranges (CAP checklist item HEM.23050)","url":"https://www.captodayonline.com/?p=16735","publisher":"CAP TODAY, College of American Pathologists","year":2014},{"title":"Labcorp sample patient report with CBC components (Sample Report 505271)","url":"https://www.labcorp.com/assets/1724","publisher":"Labcorp","year":2025}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The share of your white blood cells that are lymphocytes, immune cells that help fight viruses, shown as a percent.","url":"https://bloodtesttracker.com/markers/lymphocytes-percent","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}