{"id":"bilirubin-indirect","name":"Bilirubin, Indirect","shortName":"Indirect bilirubin","aliases":["Indirect Bilirubin","Unconjugated Bilirubin","I Bili","Bilirubin Indirect (Calc)","Bilirubin, Indirect (Unconjugated)","Bilirubin, Unconjugated","Bilirubin Indirect","Bilirubin, Indirect, Calculated","Bilirubin, Indirect (Calc)","Indirect Bili","I Bil"],"abbreviations":["I BILI","I BIL","IBIL"],"loinc":[{"code":"1971-1","primary":true},{"code":"14630-8","primary":false},{"code":"35192-4","primary":false}],"specimen":"calculated","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"18+","low":0.1,"high":0.8,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp prints 0.10–0.80 mg/dL (about 1.7–13.7 µmol/L) for indirect bilirubin. The value is total minus direct, so each lab's interval depends on how its total and direct intervals are set. Newborns are judged against age-in-hours charts, not this range. Use the range on your own report first.","sources":[{"title":"Bilirubin, Total/Direct, Serum (test 001214), sample report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001214.pdf","publisher":"Labcorp"},{"title":"Pediatric Testing Reference Ranges","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp"}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"The part of bilirubin that has not yet been processed by the liver. It is worked out by subtracting direct bilirubin from total bilirubin.","url":"https://bloodtesttracker.com/markers/bilirubin-indirect","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}