{"id":"cortisol-urine-free-24h","name":"Cortisol, Free, 24-Hour Urine","shortName":"Urine free cortisol","aliases":["Cortisol, Free, Urine","UFC","Cortisol, Urine, Free","Urinary Free Cortisol","Free Cortisol (24h Urine)","Cortisol Free, Urine, Timed","24 Hour Urinary Free Cortisol","Urine Free Cortisol","Cortisol, Urinary Free","Cortisol, Free, 24 Hour Urine","Cortisol, Free, 24-Hour Urine","Cortisol, Free, 24 Hour, Urine","Cortisol Urine Free by LC-MS/MS","Cortisol, Urine, 24 Hour","24 hr urine cortisol","Urine free cortisol, 24-hour"],"abbreviations":["UFC","24h UFC","UFC-24"],"loinc":[{"code":"2147-7","primary":true},{"code":"14676-1","primary":false}],"specimen":"urine-24h","units":[{"ucum":"ug/(24.h)","display":"µg/24 h"},{"ucum":"nmol/(24.h)","display":"nmol/24 h"}],"referenceRanges":[{"population":"Men, 18–80","low":5,"high":64,"unit":"ug/(24.h)","unitDisplay":"µg/24 h","note":"Labcorp's LC-MS/MS interval for men 18 to 80. ARUP (LC-MS/MS) prints 60 or less for men 18 and older, and Quest (LC/MS/MS, no sex split) prints 4.0–50.0 for adults. Use the range printed on your own report.","sources":[{"title":"Cortisol, Urinary Free (test 004432)","url":"https://labcorp.com/tests/004432/cortisol-urinary-free","publisher":"Labcorp"},{"title":"Cortisol Urine Free by LC-MS/MS (test 0097222)","url":"https://ltd.aruplab.com/Tests/Pub/0097222","publisher":"ARUP Laboratories"},{"title":"Cortisol, Free, 24-Hour Urine with Creatinine, LC/MS/MS (Quest test 11280)","url":"https://dos.compunetlab.com/tests/1098","publisher":"Quest Diagnostics, as listed in the Compunet Clinical Laboratories test directory"}]},{"population":"Women, 18–80","low":6,"high":42,"unit":"ug/(24.h)","unitDisplay":"µg/24 h","note":"Labcorp's LC-MS/MS interval for women 18 to 80. ARUP prints 45 or less for women 18 and older, and Quest prints 4.0–50.0 for adults of either sex. Urine cortisol rises during pregnancy, and none of these per-24-hour intervals is for pregnancy.","sources":[{"title":"Cortisol, Urinary Free (test 004432)","url":"https://labcorp.com/tests/004432/cortisol-urinary-free","publisher":"Labcorp"},{"title":"Cortisol Urine Free by LC-MS/MS (test 0097222)","url":"https://ltd.aruplab.com/Tests/Pub/0097222","publisher":"ARUP Laboratories"},{"title":"Cortisol, Free, 24-Hour Urine with Creatinine, LC/MS/MS (Quest test 11280)","url":"https://dos.compunetlab.com/tests/1098","publisher":"Quest Diagnostics, as listed in the Compunet Clinical Laboratories test directory"}]},{"population":"81+","low":3,"high":49,"unit":"ug/(24.h)","unitDisplay":"µg/24 h","note":"Labcorp's LC-MS/MS interval for people over 80, both sexes.","sources":[{"title":"Cortisol, Urinary Free (test 004432)","url":"https://labcorp.com/tests/004432/cortisol-urinary-free","publisher":"Labcorp"}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"Measures the free (active) cortisol your body clears in urine over a full day. It is one of the standard first tests when Cushing syndrome is a question.","url":"https://bloodtesttracker.com/markers/cortisol-urine-free-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."}