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Bilirubin: normal range & what your result means

Bilirubin is a yellow product from the breakdown of red cells, processed by the liver. High levels cause jaundice — yellow skin and eyes.

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Typical adult reference range

Measure	Range
Total bilirubin	0.1–1.2 mg/dL
Direct (conjugated)	0.0–0.3 mg/dL

What a HIGH result can mean

High bilirubin causes jaundice; causes include liver disease, bile-duct blockage, and increased red-cell breakdown
A common harmless cause is Gilbert’s syndrome

What a LOW result can mean

Low bilirubin is not clinically significant

Ranges vary by lab. Reference ranges are TYPICAL ADULT values and vary by laboratory, age, sex, pregnancy and the method used. Always read your result against the range printed on YOUR report, and let your doctor interpret it alongside your history.

Frequently asked questions

What does high bilirubin mean?

It can come from liver problems, a blocked bile duct, or faster red-cell breakdown. The split between direct and indirect bilirubin helps point to the cause.

Is mild high bilirubin always serious?

Not always — Gilbert’s syndrome is a common, harmless cause of mildly raised bilirubin, especially when fasting or unwell. Persistent or high levels still need review.

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MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.