Total Bilirubin (Serum)
This test measures the total amount of bilirubin in your blood. Bilirubin is a yellow pigment produced when red blood cells break down, and it helps the liver process waste products.
["Bilirubin helps identify liver function and bile flow issues."]
Key facts at a glance
- LOINC
- 77101-4
- Short code
- MRPL18A Fam Mut Anl Bld/T
- Synonyms
- MRPL18A Fam Mut Anl Bld/T
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors may order a total bilirubin test to check for liver disease, such as hepatitis, cirrhosis, or bile duct blockages. It can also help diagnose conditions like gallstones or certain blood disorders. Sometimes, it’s used to monitor treatment progress for conditions affecting the liver or bile system.
What to Expect Before the Test
No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw blood. If you’re nervous, let your healthcare provider know—they can help make it more comfortable.
What Happens During the Test
A healthcare professional will clean the area on your arm, insert a needle, and collect a small amount of blood. The process usually takes a few minutes. You may feel a slight pinch, but it’s over quickly.
What the Results Mean
Your results will show the total bilirubin level in your blood. High levels may suggest liver problems, while low levels are usually normal. Your doctor will interpret the results in the context of your overall health and symptoms.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Elevated bilirubin levels can indicate conditions like jaundice (yellowing of the skin and eyes), liver disease, gallbladder issues, or hemolytic anemia (destruction of red blood cells). Low levels are typically normal but may be checked if you have certain medical conditions. Your doctor will discuss findings with you based on your symptoms and medical history.
Short name
Total Bilirubin
Frequently asked questions
What causes bilirubin levels to be high?
How long does it take to get results?
Can I eat or drink before this test?
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