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Bilirubin, Direct
Panel: Liver Function Tests · All liver function tests
Typical adult reference range
| Conventional units | 0.0–0.3 mg/dL |
| SI units | 0–5 µmol/L |
Ranges vary between laboratories and methods — compare your result with the range printed on your own report.
What a high or low result can mean
High bilirubin, direct: high values can be seen in bile duct obstruction and liver disease affecting bile flow.
These are associations, not a diagnosis: the same result can have several causes, and your clinician interprets it with the rest of your results and history.
Good to know
The conjugated, water-soluble fraction of bilirubin.
Related tests — Liver Function Tests
Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.