{"id":"fecal-calprotectin","name":"Calprotectin, Fecal","shortName":"Fecal calprotectin","aliases":["Calprotectin, Stool","Fecal Calprotectin","FCP","Calprotectin, Feces","Calprotectin, Fecal, Quantitative","Calprotectin, F","Stool Calprotectin","Calprotectin Stool Test"],"abbreviations":["FCP"],"loinc":[{"code":"38445-3","primary":true}],"specimen":"stool","units":[{"ucum":"ug/g","display":"µg/g"},{"ucum":"mg/kg","display":"mg/kg"}],"referenceRanges":[{"population":"Adults","low":0,"high":50,"unit":"ug/g","unitDisplay":"µg/g","note":"Mayo Clinic Laboratories (ELISA) and Labcorp (chemiluminescence) use the same cut-off, with results below 50 µg/g called normal. Mayo says its values apply to all ages. Labcorp warns that results may not apply to children under 2, who have mildly raised levels. This is a decision cut-off, not the central 95% of healthy people.","sources":[{"title":"Calprotectin, Feces (test CALPR)","url":"https://www.testcatalog.org/show/CALPR","publisher":"Mayo Clinic Laboratories"},{"title":"Calprotectin, Fecal (test 123255)","url":"https://www.labcorp.com/tests/123255/calprotectin-fecal","publisher":"Labcorp"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A protein released by white blood cells into the gut. Higher levels in a stool sample can be a sign of inflammation in the intestines.","url":"https://bloodtesttracker.com/markers/fecal-calprotectin","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}