Diagnosis:
Elevated levels of bilirubin in the blood can be a sign of liver disease, such as cirrhosis, hepatitis, or biliary obstruction, or a blood disorder such as hemolytic anemia.
Low levels of bilirubin in the blood are not common.

Reference range:
Normal values for bilirubin levels in the blood vary depending on the laboratory, but generally range from 0.3 to 1.2 milligrams per deciliter (mg/dL) for total bilirubin and 0.1 to 0.3 mg/dL for direct bilirubin.

It’s important to note that the test results should be interpreted in the context of the patient’s clinical presentation and other test results. A single test result should not be used as the sole basis for diagnosis and treatment decisions. A qualified healthcare professional should interpret the test results and give you a proper diagnosis. Additionally, other liver function tests like AST, ALT, ALP, and BSBP should also be considered along with bilirubin test to get a better understanding of liver function.