{"id":"cd8-t-cells-absolute","name":"CD8+ T Cells, absolute","shortName":"CD8 count","aliases":["Absolute CD8","CD8 Absolute","CD8 Abs Cnt","CD8+ Cells, Absolute","T Suppressor/Cytotoxic Cells, Absolute","CD8 Count","CD8+ T Cell Count","CD8 T-Cell Count","Absolute CD8 Count","CD3+CD8+ Absolute","CD3+CD8+ Abs Cnt","CD8+ T Lymphocytes, Absolute","T8 Suppressor Cells, Absolute","Cytotoxic T Cells, Absolute","T8 Absolute","Absolute CD3+CD8+ Cells"],"abbreviations":["CD8 abs","CTL"],"loinc":[{"code":"14135-8","primary":true},{"code":"32517-5","primary":false}],"specimen":"whole-blood","units":[{"ucum":"/uL","display":"cells/µL"},{"ucum":"10*9/L","display":"×10⁹/L"},{"ucum":"10*3/uL","display":"×10³/µL"}],"referenceRanges":[{"population":"65+","low":150,"high":1050,"unit":"/uL","unitDisplay":"cells/µL","note":"ARUP Laboratories interval for ages 65 and older.","sources":[{"title":"Lymphocyte Subset Panel 4 - T-Cell Subsets Percent and Absolute, Whole Blood (test 0095950)","url":"https://ltd.aruplab.com/Tests/Pub/0095950","publisher":"ARUP Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The number of CD8+ T cells in a microliter of blood. These cytotoxic cells destroy infected or damaged cells.","url":"https://bloodtesttracker.com/markers/cd8-t-cells-absolute","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}