Bilirubin (Total)
This test measures the total amount of bilirubin in your blood. Bilirubin is a yellow pigment produced when your body breaks down old red blood cells.
["Bilirubin helps your liver process waste and keeps your blood healthy."]
Key facts at a glance
- LOINC
- 44170-9
- Short code
- Deprecated US Liver Bx needle guide
- Synonyms
- Deprecated US Liver Bx needle guide
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- us
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why is this test done?
Your healthcare provider may order a total bilirubin test to check for liver problems, such as hepatitis, bile duct blockages, or other conditions that affect how your liver processes bilirubin. It can also help diagnose conditions like jaundice, where the skin or eyes turn yellow due to high bilirubin levels.
What does the test involve?
A small sample of blood is taken from a vein in your arm. The blood is then sent to a lab where it is analyzed to measure bilirubin levels. No special preparation is usually needed, but you may be asked to avoid certain medications or foods that could affect results.
What do the results mean?
Results can vary depending on your health and other factors. High bilirubin levels may indicate liver or bile duct problems, while low levels might suggest certain blood disorders or liver diseases. Your healthcare provider will discuss the results with you in detail.
What are common causes of abnormal results?
Elevated bilirubin can be caused by liver diseases (like cirrhosis or hepatitis), blockages in the bile ducts, hemolytic anemia (where red blood cells break down too quickly), or certain medications. Low bilirubin levels can sometimes be linked to liver disease or other conditions affecting bilirubin metabolism.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Total Bilirubin
Frequently asked questions
How often should I get this test?
What should I do if my bilirubin test results are abnormal?
Can diet or lifestyle changes affect bilirubin levels?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy