LabCorp Test

Bilirubin Direct Blood Test

Quick Overview

Evaluate liver and biliary disease. Increased direct bilirubin occurs with biliary diseases, including both intrahepatic and extrahepatic lesions.

Test #001222


Availability: In stock

Also Known As Bilirubin Conjugated
Preparation No special preparation required.
Test Results 7-8 days. May take longer based on weather, holiday or lab delays.


At Walk-in Lab, you’ll find a host of general screening tests that can help you and your doctor to gain a more accurate picture of your overall health. Our bilirubin direct blood test is one test that is extremely important for patients of all ages and demographics. Bilirubin is a substance that is found in bile, and is typically yellowish-brown in color. When the liver breaks down old red blood cells, bilirubin is produced and is then eliminated from the body through normal stool. Bilirubin is present in the bloodstream in two basic forms – indirect and direct bilirubin. Direct bilirubin is dissolved in water and is produced from the liver from indirect bilirubin. Direct bilirubin is measured directly from a blood sample using one of our bilirubin direct blood tests.

Those that show high bilirubin levels are often afflicted with yellowed skin and eyes – a condition known as jaundice. Jaundice can be caused by a host of problems, the most common being liver diseases like hepatitis, disorders of the blood, or any blockages of the bile ducts – the tubes that facilitate the movement of bile from the liver to the small intestine. Younger patients – especially newborns, are susceptible to jaundice and must be treated appropriately. Jaundice in these youngsters can cause brain damage and other serious health concerns.

Bilirubin direct testing is often done for one or more of the following reasons:
• To ensure proper functioning of the liver and to detect any health issues like cirrhosis, hepatitis, or damage caused by medicines.
• This test is also conducted to ensure that the bile ducts are unobstructed and can permit the free flow of bile from the liver to the small intestine. Tumors, gallstones, and other foreign bodies can block these important ducts and may cause significant discomfort and immediate medical concerns.
• The test can check for conditions that cause heightened destruction of red blood cells, like hemolytic anemia.
• These tests are also used to gauge the level of bilirubin in newborns, which can then prompt additional treatments to ensure safe levels. Many newborns undergo phototherapy, which is essentially a treatment protocol that subjects them to warming, bright lights. Other more extreme cases of jaundice may require blood transfusions.

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