{"id":"mercury-urine-24h","name":"Mercury, 24-Hour Urine","shortName":"24-h Urine Mercury","aliases":["Mercury, Urine 24 Hr","Mercury ug/24 h","Mercury, Urine (24h)","24-Hour Urine Mercury","Mercury, Urine - per 24h","Mercury, 24 Hr, U","Mercury 24 Hour Urine"],"abbreviations":["U-Hg 24h"],"loinc":[{"code":"6693-6","primary":true},{"code":"25471-4","primary":false}],"specimen":"urine-24h","units":[{"ucum":"ug/(24.h)","display":"µg/24 h"},{"ucum":"nmol/(24.h)","display":"nmol/24 h"}],"referenceRanges":[{"population":"18+","low":null,"high":2,"unit":"ug/(24.h)","unitDisplay":"µg/24 h","note":"Mayo Clinic Laboratories limit for adults (less than 2 µg per 24 hours). ARUP Laboratories lists a much higher upper limit of 20.0 µg/day, so labs differ about tenfold. Mayo has no reference values for people under 18.","sources":[{"title":"Heavy Metals Screen, with Reflex, 24 Hour, Urine (test HMU24)","url":"https://www.testcatalog.org/show/HMU24","publisher":"Mayo Clinic Laboratories (via the testcatalog.org mirror)"},{"title":"Mercury, Urine (test 0025050)","url":"https://ltd.aruplab.com/Tests/Pub/0025050","publisher":"ARUP Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Total mercury passed in urine over 24 hours, mostly from inorganic or elemental mercury such as vapor from spills, fillings or work exposure.","url":"https://bloodtesttracker.com/markers/mercury-urine-24h","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}