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Also reported in: umol/L
Normal direct bilirubin is consistent with adequate hepatic conjugation and biliary excretion of bilirubin. When total bilirubin is elevated but direct bilirubin is normal, the cause is likely pre-hepatic (hemolysis) or Gilbert's syndrome (impaired uptake). When direct bilirubin is elevated alongside total bilirubin, liver disease or bile duct obstruction is more likely.
Direct (conjugated) bilirubin is bilirubin that the liver has already processed and prepared for excretion into bile. An undetectable level means bilirubin is flowing smoothly through the liver and into the bile ducts without any backup. This is the ideal result for liver excretory function.
Excellent liver function result. No action needed.
Direct Bilirubin: {{value}} {{unit}} — undetectable (ref: <{{high}})Very low direct bilirubin is consistent with that the liver is converting and excreting bilirubin efficiently through normal bile pathways. No obstruction or impairment of the liver's excretory machinery is detectable. This is a reassuring liver function result.
Good result. No biliary obstruction detectable.
Direct Bilirubin: {{value}} {{unit}} — very low (ref: <{{high}})A borderline low direct bilirubin is entirely within the normal range and indicates proper liver processing and bile excretion. The liver is efficiently conjugating and clearing bilirubin through the bile duct system.
No action needed. Normal liver bile processing.
Direct Bilirubin: {{value}} {{unit}} — low normal (ref: <{{high}})Normal direct bilirubin is consistent with adequate hepatic conjugation and biliary excretion of bilirubin. When total bilirubin is elevated but direct bilirubin is normal, the cause is likely pre-hepatic (hemolysis) or Gilbert's syndrome (impaired uptake). When direct bilirubin is elevated alongside total bilirubin, liver disease or bile duct obstruction is more likely.
Normal result. Useful in distinguishing the type of jaundice when total bilirubin is elevated.
Direct Bilirubin: {{value}} {{unit}} — normal (ref: <{{high}})Optimal direct bilirubin below 0.2 mg/dL reflects seamless liver conjugation and biliary excretion of bilirubin. At this level there is no evidence of intrahepatic or extrahepatic cholestasis, and the bile duct pathway is flowing freely.
Excellent liver and bile duct health indicator.
Direct Bilirubin: {{value}} {{unit}} — optimal (ref: 0.0–0.2)A borderline elevated direct bilirubin suggests some degree of impairment in the liver's ability to excrete conjugated bilirubin into bile. This can reflect early cholestasis, mild bile duct inflammation, medication effects, or early liver disease. Direct bilirubin elevation is a more specific liver/bile duct marker than indirect bilirubin elevation.
Discuss with your doctor. Liver enzyme panel and ultrasound can help identify the cause of borderline direct bilirubin elevation.
Direct Bilirubin: {{value}} {{unit}} — borderline elevated (ref: <{{high}}; borderline: 0.3–0.5)An elevated direct bilirubin is a specific signal that the liver's conjugated bilirubin excretion into bile is impaired. This occurs in intrahepatic cholestasis (impaired bile flow within the liver due to hepatitis, cirrhosis, or drug reactions) or extrahepatic obstruction (gallstones, bile duct stricture, pancreatic head tumor compressing the bile duct).
Medical evaluation is needed. Liver ultrasound and full liver enzyme panel are the first steps to distinguish intrahepatic from extrahepatic may contribute to.
Direct Bilirubin: {{value}} {{unit}} — elevated (ref: <{{high}}; elevated: >0.5)A very high direct bilirubin above 5.0 mg/dL indicates very impaired hepatobiliary function. This level is associated with major bile duct obstruction, acute liver failure, noticeable cholestatic hepatitis, or primary biliary cholangitis in flare. Massive bile pigment accumulation may contribute to intense jaundice and potentially serious systemic toxicity.
Seek emergency medical care. Urgent hepatology or gastroenterology evaluation and imaging are needed to identify and relieve the obstruction or manage the liver failure.
Direct Bilirubin: {{value}} {{unit}} — very high (ref: <{{high}}; critical: >5.0)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.