{"id":"arsenic-urine","name":"Arsenic, Urine","shortName":"Arsenic (urine)","aliases":["Arsenic, Random Urine","Arsenic, Urine (ug/L)","Urine Arsenic","As, Urine","Arsenic, Total, Urine","Arsenic, Urine, Random"],"abbreviations":[],"loinc":[{"code":"5586-3","primary":true},{"code":"30924-5","primary":false},{"code":"15115-9","primary":false}],"specimen":"urine","units":[{"ucum":"ug/L","display":"µg/L"},{"ucum":"ng/mL","display":"ng/mL"},{"ucum":"nmol/L","display":"nmol/L"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"Adults","low":null,"high":35,"unit":"ug/L","unitDisplay":"µg/L","note":"Mayo Clinic Laboratories uses <35 µg/L, with no age split. It is the ACGIH occupational limit (measured at the end of the work week), which Mayo applies to toxic arsenic: inorganic arsenic plus its methylated forms. A total arsenic result also counts harmless seafood arsenic, so a total above 35 can come from a recent seafood meal. ATSDR, a US government agency, describes total urine arsenic above 100 µg/L as abnormal in its guidance for clinicians. Other labs can use different limits, and the range printed on your own report is the one that applies to your result.","sources":[{"title":"Arsenic Speciation, Random, Urine (Mayo test SPAS)","url":"https://www.testcatalog.org/show/SPAS","publisher":"Mayo Clinic Laboratories (catalog mirrored at testcatalog.org)"},{"title":"Arsenic Occupational Exposure, with Reflex, Random, Urine (Mayo test ASUOE)","url":"https://www.testcatalog.org/show/ASUOE","publisher":"Mayo Clinic Laboratories (catalog mirrored at testcatalog.org)"},{"title":"Arsenic Toxicity: Clinical Assessment (Case Studies in Environmental Medicine)","url":"https://web.archive.org/web/20231205014355/https://atsdr.cdc.gov/csem/arsenic/clinical_assessment.html","publisher":"ATSDR (archived copy)"},{"title":"Recommendations for provoked challenge urine testing","url":"https://pubmed.ncbi.nlm.nih.gov/24113861/","publisher":"Journal of Medical Toxicology","year":2013}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures how much arsenic is in a single urine sample, a common first test for recent arsenic exposure.","url":"https://bloodtesttracker.com/markers/arsenic-urine","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}