{"id":"bilirubin-direct","name":"Bilirubin, Direct","shortName":"Direct bilirubin","aliases":["Direct Bilirubin","Conjugated Bilirubin","D Bili","D Bil","Bilirubin, Direct (Conjugated)","Bilirubin Conjugated","Bilirrubina directa","Bilirubin, Conjugated","Bilirubin, Direct, Serum","Bilirubin Direct","Direct Bilirubin, Serum","Bilirubin, Direct, Serum or Plasma","Bili Direct","DBIL"],"abbreviations":["DBIL","D BILI","D BIL"],"loinc":[{"code":"1968-7","primary":true},{"code":"14629-0","primary":false},{"code":"35191-6","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"mg/dL","display":"mg/dL"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"18+","low":0,"high":0.4,"unit":"mg/dL","unitDisplay":"mg/dL","note":"Labcorp's test page prints 0.00–0.40 mg/dL for children older than 1 month and adults (up to about 6.8 µmol/L). Other sources are a little lower: Mayo Clinic Laboratories prints 0.0–0.3 mg/dL from age 12 months, and MedlinePlus says a normal direct bilirubin is under 0.3 mg/dL (under 5.1 µmol/L). Intervals differ by lab and method, so use the range on your own report first.","sources":[{"title":"Bilirubin, Direct (test 001222), sample report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001222.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"},{"title":"Liver Profile, Serum (test ID LIVPR)","url":"https://www.testcatalog.org/show/LIVPR","publisher":"Mayo Clinic Laboratories"},{"title":"Bilirubin blood test","url":"https://medlineplus.gov/ency/article/003479.htm","publisher":"MedlinePlus, National Library of Medicine","year":2025}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The part of bilirubin your liver has already processed. A raised level can be a sign that bile isn't draining from the liver as usual.","url":"https://bloodtesttracker.com/markers/bilirubin-direct","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}