{"id":"cd8-t-cells-percent","name":"CD8+ T Cells, percent","shortName":"CD8 %","aliases":["CD8 %","CD8+ Percent","% CD8+","CD8 Cells %","T Suppressor/Cytotoxic Cells %","CD8 Percent","% CD8","CD8+ T Cells %","CD3+CD8+ %","CD3+CD8+ Percent","T8 Suppressor Cells %","Cytotoxic T Cells %","CD8+ T Lymphocytes, percent","Percent CD8 Lymphocytes"],"abbreviations":["CD8 pct"],"loinc":[{"code":"32518-3","primary":true},{"code":"8101-8","primary":false}],"specimen":"whole-blood","units":[{"ucum":"%","display":"%"}],"referenceRanges":[{"population":"65+","low":10,"high":46,"unit":"%","unitDisplay":"%","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 share of your lymphocytes that are CD8+ T cells. It is read together with the CD8 count and the CD4 results.","url":"https://bloodtesttracker.com/markers/cd8-t-cells-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."}