{"id":"lead-blood","name":"Lead, Blood","shortName":"Blood Lead","aliases":["Blood Lead","Lead, Whole Blood","BLL","Pb","Lead","Blood Lead Level","Lead (Pb), Blood","Lead, Venous","Plomo en sangre","Lead, Whole Blood (Venous)","Lead, Blood (Venous)","Lead, Whole Blood (Capillary)","Lead, Blood (Capillary)","Lead Level, Blood"],"abbreviations":["Pb","BLL","PbB"],"loinc":[{"code":"5671-3","primary":true},{"code":"77307-7","primary":false},{"code":"10368-9","primary":false},{"code":"14807-2","primary":false}],"specimen":"whole-blood","units":[{"ucum":"ug/dL","display":"µg/dL"},{"ucum":"ug/L","display":"µg/L"},{"ucum":"umol/L","display":"µmol/L"},{"ucum":"nmol/L","display":"nmol/L"}],"referenceRanges":[{"population":"Adults","low":null,"high":3.4,"unit":"ug/dL","unitDisplay":"µg/dL","note":"Based on CDC's blood lead reference value of 3.5 µg/dL, the 97.5th percentile of US children's levels in the 2015-2018 NHANES surveys. CSTE uses the same value for adults. A result of 3.5 or higher is above the reference value, and ARUP prints the interval as 3.4 or lower. It marks levels higher than those of most people in the US. It is not a cutoff between safe and harmful.","sources":[{"title":"Data and Statistics: Childhood Lead Poisoning Prevention (blood lead reference value)","url":"https://www.cdc.gov/lead-prevention/php/data/index.html","publisher":"Centers for Disease Control and Prevention","year":2021},{"title":"Blood Lead Level Guidance","url":"https://www.cdc.gov/niosh/lead/bll-reference/index.html","publisher":"CDC / NIOSH"},{"title":"Lead, Whole Blood (Venous) (test 0020098)","url":"https://ltd.aruplab.com/Tests/Pub/0020098","publisher":"ARUP Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures lead in your blood, the standard test for recent lead exposure. Most people in the US have very low levels.","url":"https://bloodtesttracker.com/markers/lead-blood","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}