{"id":"urine-fentanyl","name":"Urine Fentanyl Screen","shortName":"Urine fentanyl","aliases":["Fentanyl, Urine","FEN","Fentanyl Screen","Fentanyl/Norfentanyl, Urine","Norfentanyl, Urine","Fentanyl and Norfentanyl, Urine","Fentanyl Screen, Urine","Urine Fentanyl","Fentanyl, Urine, Qualitative","Fentanilo en orina"],"abbreviations":["FENT","NFENT","FEN"],"loinc":[{"code":"59673-4","primary":true},{"code":"58379-9","primary":false},{"code":"95797-7","primary":false},{"code":"113379-2","primary":false},{"code":"114025-0","primary":false},{"code":"40839-3","primary":false},{"code":"66129-8","primary":false},{"code":"11235-9","primary":false}],"specimen":"urine","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A urine screen for fentanyl, a very strong opioid, and norfentanyl, its main breakdown product. A positive result is presumptive until confirmed.","url":"https://bloodtesttracker.com/markers/urine-fentanyl","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}